KR20220107411A - Fuel Tank Apparatus and Ship having the same - Google Patents

Abstract

The present invention relates to a fuel tank device having a platform that is not affected by heat shrinkage of the fuel tank. According to an embodiment of the present invention, a fuel tank device comprises: a fuel tank which stores fuel inside; a saddle for supporting the storage tank; and a platform installed above the fuel tank. The platform includes a top plate and support members supporting the top plate at an upper portion of the fuel tank. Each of the support members may include: a leg support part for fixing and supporting legs of the top plate; an upper support part supporting the leg support part; a lower support part supporting the upper support part; and a straight moving part and a rotational moving part respectively installed on the upper support part and the lower support part.

Description

Fuel Tank Apparatus and Ship having the same

The present invention relates to a fuel tank device and a ship including the same.

In general, ships have propulsion by an engine that generates power by combustion of fuel, and diesel, heavy oil, MOD (Marine Diesel Oil), MFO (Marine Fuel Oil), etc. Due to the large amount of harmful substances that are generated, it is a cause of causing environmental pollution.

For this reason, as an eco-friendly ship (Green-ship), a ship using liquefied natural gas (hereinafter referred to as "LNG") as a fuel has been developed, and official certification (Approval In Principle, AIP) has been obtained from the classification of each country. It has been approved and meets the demand for conversion to clean energy due to environmental regulations.

A fuel tank for using LNG as a fuel is provided on a ship. The design and construction of fuel tanks is mainly regulated by the International Maritime Organization (IMO) through the application of IGC Code and IGF Code.

These fuel tanks are manufactured in various types and installed on ships. Among the independent tanks, there are IMO Type A, IMO Type B, IMO Type C, and Novel Design.

In the case of IMO Type A, since the hull itself must be made of expensive metal that can withstand cryogenic temperatures, the cost of building the hull increases. It is undesirable in terms of installation location because protection means must be installed in the tank. In the case of IMO Type C, which is a pressure tank, it is easier to manufacture and install compared to a low-temperature tank, and it does not require various analysis and has high safety, so it is widely adopted.

1 is a side view schematically showing a conventional C-Type liquefied gas storage tank.

As shown in FIG. 1 , in the C-Type tank 20 of the pressure vessel type among the liquefied gas storage tanks, the fuel tank 22 having a cylindrical shape and a circular cross-sectional shape is supported by a saddle 21 . It can be installed on the upper deck of the ship. The fuel tank 22 has a dome 24 formed on the upper surface of the tank, and a fuel supply line is connected directly downward from the dome 24 . And a platform 26 is provided on the upper portion of the fuel tank 22 for the convenience of the operator.

In this existing C-Type tank 20, since the platform 26 is installed on the upper part of the fuel tank by welding, damage to the platform 26 directly fixed to the fuel tank occurs when heat shrinkage of the fuel tank occurs. continuous improvement is required.

The present invention provides a fuel tank device having a platform that is not affected by thermal contraction of the fuel tank, and a ship including the same.

The problems to be solved by the present invention are not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, a fuel tank for storing fuel therein; saddles for supporting the storage tank; and a platform installed above the fuel tank; The platform includes a top plate and support parts for supporting the top plate on the upper part of the fuel tank, and each of the support parts includes a leg support part on which the legs of the top plate are fixedly supported; and an upper support portion supporting the leg support portion; a lower support for supporting the upper support; And it may be provided with a fuel tank device including a straight moving part and a rotary moving part respectively installed in the upper support part and the lower support part.

In addition, the straight moving part may be provided as a straight orifice fluid damper that is connected to the leg support part and installed on the upper support part, and provides a restraining force with respect to a moving direction when the fuel tank is thermally contracted.

In addition, the rotary moving part may be provided between the upper support part and the lower support part, and may be provided as a rotary orifice fluid damper that provides a restraining force with respect to a rotation direction during thermal contraction of the fuel tank.

In addition, the upper support part may provide a slide space in which a part of the leg support part is inserted, and the leg support part can flow according to heat contraction of the fuel tank.

In addition, the slide space may be provided in a direction toward the center of the platform.

In addition, the straight orifice fluid damper may be connected to the leg support in the slide space.

In addition, liquefied gas may be stored in the fuel tank.

According to the embodiment of the present invention, since the platform is not affected by thermal contraction/thermal expansion of the fuel tank, damage to the platform can be prevented.

Effects of the present invention are not limited to the above-described effects, and effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the present specification and accompanying drawings.

1 is a side view schematically showing a conventional C-Type liquefied gas storage tank.
2 is a view showing a ship according to an embodiment of the present invention;
3 is a perspective view illustrating a fuel tank device according to an embodiment of the present invention.
4 is a front view showing a platform installed in the fuel tank shown in FIG. 3 .
FIG. 5 is a side view showing a platform installed in the fuel tank shown in FIG. 3 .
FIG. 6 is a view taken along line 6-6 shown in FIG. 4 .
7 is an exploded perspective view for explaining a support part.

Other advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and the present invention is only defined by the scope of the claims. Unless defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by common skill in the prior art to which this invention belongs. A general description of known configurations may be omitted so as not to obscure the gist of the present invention. In the drawings of the present invention, the same reference numerals are used as much as possible for the same or corresponding components. In order to help the understanding of the present invention, some components in the drawings may be shown exaggerated or reduced to some extent.

Figure 2 is a view showing a ship according to an embodiment of the present invention, Figure 3 is a perspective view for explaining the fuel tank device according to an embodiment of the present invention, Figure 4 is the fuel tank device shown in Figure 3 is a front view, and FIG. 5 is a side view of the fuel tank device shown in FIG. 3 .

2 to 5 , in the ship 10 according to an embodiment of the present invention, a cargo hold (not shown) is provided inside the hull 100 , and the on upper deck which is the uppermost deck of the hull 100 . A fuel tank device 200 is provided on the 110 and liquefied gas such as LNG may be stored as a fuel for driving an engine (not shown) for propelling the ship 10 .

The vessel 10 in which the fuel tank device 200 of the present invention is installed is a tanker, LNG, which carries a large amount of minerals, crude oil, natural gas, or cargo such as thousands of containers in a cargo hold and sails the ocean. It may be a large vessel such as a carrier, an LPG carrier, a container carrier, a car carrier, a bulk carrier, or a mineral carrier. Of course, (10) may be included.

According to this embodiment, the fuel tank device 200 may include a fuel tank 210 , a saddle 230 , and a platform 250 .

The fuel tank 210 is an IMO Type C (or Novel Design) having a cylindrical shape and a circular cross-sectional shape, and is a pressure tank capable of storing cryogenic LNG gas in a liquid phase to supply fuel to an engine (not shown). can be provided as

The fuel tank 210 may be installed on the upper deck 110 of the ship 10 while being supported by a saddle 230 to be described later. The installation location of the fuel tank 210 is preferably installed close to the engine (not shown). For example, the fuel tank 210 may be installed in the free space of the front, rear, or side with respect to the cabin. Of course, the present invention is not limited thereto and may be installed at an appropriate location in consideration of the movement of the crane and the movement of the cargo during loading and unloading of cargo.

In addition, a dome 212 is formed on the upper portion of the fuel tank 210 so that a plurality of lines (not shown) may be installed. Here, the plurality of lines may be formed of lines for the inlet and discharge of fuel, diagnosis of the tank state, and the like, and the dome 212 is formed with a first manhole for the inflow into the fuel tank 110 . maintenance can be achieved.

Such, the fuel tank 110 is provided on the upper deck 110 of the hull 10, for example, the fuel tank 210 may be provided in pairs on the hull 100, the hull 100 It can be arranged side by side biased to each of the port and starboard of

At least two saddles 230 may be fixedly installed on the upper deck 110 , and the upper surface may be curved to support the tank bottom 214 of the fuel tank 210 . A support block 240 may be provided between the saddle 230 and the fuel tank 210 . The support block 240 may be provided to minimize heat transfer between the fuel tank 210 and the saddle 230 . The support block 240 may be made of wood having high thermal insulation properties, and the support block 240 may be joined to the upper surface of the saddle (or the lower surface of the fuel tank) by a bonding layer.

The fuel tank device 200 has a separation preventing means 280 for preventing the fuel tank 210 from being separated from the saddle 230 .

Meanwhile, the platform 250 may be provided around the dome 212 of the fuel tank 210 . The platform 250 is provided for an operator to connect a plurality of lines provided to the dome 212 or to maintain the fuel tank 210 inside.

FIG. 6 is a view taken along line 6-6 shown in FIG. 5 , and FIG. 7 is a perspective view for explaining the support part.

3 to 7 , the platform 250 may include a top plate 252 corresponding to a passage through which a worker moves, and a plurality of support parts 260 supporting the top plate 252 .

The support parts 260 may be provided to provide fluidity with respect to thermal contraction and thermal expansion of the fuel tank 210 . A plurality of support parts 260 may be disposed on the edge of the upper plate 252 .

Since the platform 250 has four support parts 260 capable of rotation and translation at the outside, when the fuel tank 210 contracts (or expands), the support part 260 rotates and moves according to the contracting direction. Thus, the load generated on the support part 260 can be reduced. In particular, the supports 260 of the present invention include orifice fluid dampers 293 and 284 to provide a constraining force with respect to the direction of movement and rotation of the support force of the leg. Accordingly, when a large inertial force or a sudden external force acts on the leg 254, it provides a restraining force against the sudden change due to the characteristics of the orifice fluid dampers 293 and 284. Of course, since shrinkage and expansion according to temperature change of the fuel tank 210 occur relatively slowly, there is no resistance to the orifice fluid damper, and thus stress due to the tank shrinkage and expansion does not occur.

Each of the support parts 260 may be provided in the same configuration. For example, the support parts 260 may include a leg support part 270 , an upper support part 280 , and a lower support part 290 .

The lower support 290 may be fixedly supported to the fuel tank 210 by welding. The upper support 280 may be provided on the upper end of the lower support 290 . The lower support 290 is provided with a rotation moving part 292 . The rotational moving part 292 is provided between the upper support part 280 and the lower support part 290 . The rotational moving part 292 may include a rotational orifice fluid damper 293 and a rotational bearing 294 that provide a restraining force with respect to a rotational direction during thermal contraction of the fuel tank 210 .

The upper support part 280 supports the leg support part 270 . The upper support 280 provides a slide space 288 . A part of the leg support part 270 is inserted into the slide space 288 , and the leg support part 270 may flow in the slide space 288 according to thermal contraction of the fuel tank 210 . The slide space 288 is provided with a rectilinear movement unit 282 . The rectilinear movement unit 282 may include a rectilinear orifice fluid damper 284 that is connected to the leg support unit 270 and provides a restraining force with respect to a moving direction during thermal contraction of the fuel tank 210 .

The leg support 270 is movably installed on the upper support 280 . A leg 254 installed on the bottom surface of the upper plate 252 of the platform is fixed to the upper end of the leg support part 270 .

In the platform 250 having the support parts 260 as described above, when the fuel tank 210 is thermally contracted, the leg support part 270 slides in the slide space 288 in the inward direction (the center of the fuel tank or the center of the platform). can be

As such, the support part 260 is capable of fluidly moving in the slide space 288 according to the thermal contraction of the fuel tank 210 by the leg support part 270, and the upper support part 280 is rotatable, so that the fuel tank ( It is possible to reduce the load applied to the platform 250 during the contraction/expansion of the 210), and it can be designed without considering the thermal contraction of the fuel tank when designing the platform 250, and the leg 254 has a large inertia force or a sudden When an external force is applied, the properties of the orifice fluid damper can provide restraint against sudden changes.

The above detailed description is illustrative of the present invention. In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and/or within the scope of skill or knowledge in the art. The written embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in the specific application field and use of the present invention are possible. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed to include other embodiments as well.

210: fuel tank 230: saddle
250: platform 252: top plate
260: support 270: leg support
280: upper support 290: lower support

Claims (5)

a fuel tank that stores fuel inside;
saddles for supporting the storage tank; and
a platform installed above the fuel tank;
the platform is
top plate and
and support parts for supporting the upper plate at an upper portion of the fuel tank,
Each of the supports
a leg support part on which the legs of the upper plate are fixedly supported; and
an upper support for supporting the leg support;
a lower support for supporting the upper support; and
A fuel tank device including a straight moving part and a rotation moving part respectively installed in the upper support part and the lower support part. According to claim 1,
The straight moving part
A fuel tank device that is connected to the leg support part and installed on the upper support part, and is provided as a straight-through orifice fluid damper that provides a restraining force with respect to a movement direction during thermal contraction of the fuel tank. 3. The method according to claim 1 or 2,
The rotary moving part
A fuel tank device that is provided between the upper support part and the lower support part and is provided as a rotary orifice fluid damper that provides a restraining force with respect to a rotation direction when the fuel tank is thermally contracted. 3. The method of claim 2,
the upper support
A part of the leg support part is inserted, and a slide space is provided in which the leg support part can flow according to thermal contraction of the fuel tank,
The straight orifice fluid damper is
A fuel tank device connected to the leg support portion in the slide space. A ship comprising the fuel tank device according to any one of claims 1 to 4.

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