JP6484686B1 - Banker station ceiling structure of gas fueled ship - Google Patents

Abstract

[PROBLEMS] A bunker station ceiling of a gas-fueled ship in which volatile gas such as fuel LNG does not stay for the bunker station ceiling used in combination with the cargo bay while securing the floor strength of the cargo bay disposed above the bunker station Provide structure.
SOLUTION: In a bunker station ceiling structure of a gas-fueled ship, a bunker station 2 having a partially open cross-sectional opening with a part of the hull outside the cargo bay under the upper cargo bay and a plurality of hull members supporting the cargo bay. A flat and flush ceiling plate is provided down to the upper open end of the semi-closed opening of the bunker station.
[Selected figure] Figure 2

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a bunker station ceiling structure of a semi-closed gas-fueled ship provided with a gas manifold for loading the fuel gas into the fuel tank of the gas-fueled ship.

  An LNG gas fueled ship using LNG as a powerful measure to meet SOx regulations that require the ship to use fuel containing sulfur (S) component of 0.5% or less from 2020 Development and construction of ") is in progress.

  As for so-called LNG bunkering, in which LNG fuel is loaded into the fuel tank of the LNG fuel vessel, (a) Shore to Ship method of supplying LNG from the LNG tank installed on land to the fuel tank of the LNG fuel vessel, (b) There is a Ship to Ship method in which an LNG bunker (supply) ship supplies LNG to the LNG fueled ship, and (c) a Truck to Ship method in which LNG is supplied from the LNG tanker to the LNG fueled ship. FIG. 4 is a schematic view showing the “(a) Shore to Ship system for supplying LNG from the LNG tank installed on land to the fuel tank of the LNG fuel vessel”, and in FIG. 202 is a land LNG tank, 203 is a quay and a pier, 204 is a bunkering supply device, and 205 is a bunkering line, and the gas installed inside from the bunker station (not shown) of the LNG ship 201 LNG is loaded into the fuel tank (not shown) (the symbols have been described using the 200 series 3 digit to clarify prior art).

As a bunker station of this kind of LNG fuel vessel, for example, one disclosed in Japanese Patent Application Publication No. 2011-503463 is known.
FIG. 5 is a view described in the same publication as FIG. 1 (FIG. 1) showing a first embodiment of the invention name “method of operating an LNG fueled marine vessel” disclosed in Japanese Patent Application Publication No. 2011-503463; 6 shows an example of “(c) Truck to Ship method of supplying LNG from an LNG tanker to an LNG fueled ship”.

  In FIG. 5, reference numeral 101 is a marine vessel, 102 is a bunkering facility, 103 is an LNG storage tank, 104 is a pressure assembly circuit, 105 is a heat exchanger, 106 is an exhaust pipe, and 107 is a fuel supply. Line 108, heat medium circuit 109, cooling line 110, LNG tanker truck 110, bunker station 111, inlet pipe 112, emergency pipe 113, stop valve 114, bunkering line 115 Two-way valve 116 is a branch pipe 117 is a branch pipe 118 is a nozzle assembly 119 is a purge connection 171 is a power unit 191 is a cooling line valve 192 is a circulation pump 121 Is the outlet pipe, 122 is the emergency stop valve, 123 is the bunker connection line (the code reveals it is prior art For, in the present applicant, it has been described by changing the three-digit.).

  A first example of "a method of operating an LNG fueled marine vessel" shown in Fig. 5 "provides efficient transport of fuel, particularly LNG, while maintaining a controlled flow rate". In the objective invention solution subject (see the same publication paragraph 0004-0006), “... the marine vessel connects the source of LNG to the bunkering line of the marine vessel, and then, via the bunkering line By supplying LNG to the marine vessel, thereby cooling the bunkering line before the bunkering operation. See, eg, claim 1), "· · · the bunkering line is preferably cooled to a temperature level corresponding to the temperature level of the LNG · · · which helps avoid two-phase flow, Helps to provide a lower pressure pulse to the bunkering line, which in principle provides a faster flow rate from the beginning of the bunkering operation, resulting in an earlier bunkering operation. (See the paragraph No. 0008 of the same specification).

  As apparent from FIG. 5, in the marine vessel 101, a gas manifold for loading the LNG fuel into the LNG storage tank 103 is installed in the bunker station 111, only a part of the surface facing the mantle is opened. A bunker station 111 of a semi-closed structure with a cross-sectional recess shape is provided on the heel side skin.

  6 is a cross-sectional view schematically showing the ceiling structure of the bunker station 111 shown in FIG. 5. In FIG. 6, 111 is a bunker station, 112 is an inlet pipe, 114 is a bunkering line, 123 is a bunkering line. , Bunker connection line (in FIG. 4, it is described as "bunkering line 205" but both are the same), 210 is a ship-side outer plate, 211 is a joint portion, 212 is a drip tray, 213, 213, 213 are hull members longitudinally passed in the longitudinal direction of the hull and supporting the cargo weir, 214 is the floor of the cargo weir used in conjunction with the ceiling of the bunker station 111, 216 is leaked volatile LNG (reference numeral is In order to clarify that it is prior art, it changed and demonstrated to the 3-digit serial number.).

  As apparent from FIG. 6, the bunker station 111 provided on the weir side shown in FIG. 6 supports the load such as the cargo loaded on the cargo weir disposed thereon, and the hull members 213 and 213 are provided. , 213 are required, and the hull members 213, 213, 213 are exposed to the inside to be exposed, and when the fuel LNG leaks, the hull members 213, 213, It will stay during 213 hours.

  In a conventional ship using C heavy oil or the like as fuel, even if the fuel oil leaks, the amount of volatilization is very small and the flash temperature is also high, so there is no problem. However, in the case of LNG fuel used for car carriers etc., when fuel LNG leaks, the amount according to the leak evaporates approximately 600 times, and if the ambient temperature is higher than -113 ° C, it will be better than air. The gas is diffused to the upper part in order to be lightened, and there is a possibility that the volatile gas may stay between the hull members 213, 213, 213. On the other hand, the bunker station 111 has a semi-closed structure with a cross-sectional recess on the freeboard side, and the upper part of its ceiling has to be used as the floor 214 of the cargo bay, so it is structurally fragile. Do not become.

Japanese Patent Publication No. 2011-503463

  Therefore, the present invention is used in combination with the cargo shed floor while securing the floor strength of the cargo weir disposed at the upper part of the bunker station in the semi-closed bunker station 111 having a cross-sectional recess shape on the freeboard side outer plate It is an object of the present invention to provide a bunker station ceiling structure of a gas fueled vessel in which volatile gas such as fuel LNG does not stay for the bunker station ceiling.

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is a bunker station ceiling structure of a gas-fueled ship, in which a part of the hull outside the cargo hold under the upper cargo hold is a bunker station And a flat ceiling plate which is flat and flush to the upper open end of the semi-closed opening of the bunker station under a plurality of hull members supporting the cargo hold.
The invention according to claim 2 of the present application is characterized in that, in the bunker station ceiling structure of the gas fuel vessel according to the above-mentioned claim 1, the ceiling plate is a ceiling plate provided separately from the cargo storage floor plate. I assume.
Furthermore, the invention according to claim 3 of the present application is the ceiling structure of a bunker station of a gas fueled ship according to the above-mentioned claim 1, wherein the ceiling is flat and flush to the upper open end of the semi-closed opening of the bunker station. instead of the plate, the volatile fuel gas remaining in the ceiling portion, characterized in that a ceiling plate having an inclined flowing naturally.
The invention according to claim 4 of the present application is the ceiling structure of a bunker station of a gas-fueled ship according to claim 1, wherein the ceiling is flat and flush to the upper opening end of the semi-closed opening of the bunker station. instead of a plate, characterized in that it is a ceiling plate of the gas flow can mountain shape or irregular shape in the ship's side direction.
The invention according to claim 5 of the present application is the ceiling structure of a bunker station of a gas fueled ship according to claim 1, wherein the ceiling plate is a ceiling installed under a plurality of hull members supporting the cargo hold. It is characterized by being a board.
The invention according to claim 6 of the present application is characterized in that, in the bunker station ceiling structure of the gas fuel vessel according to the above-mentioned claim 5, the upper portion of the ceiling plate is a vacant place.
Furthermore, the invention according to claim 7 of the present application is characterized in that, in the bunker station ceiling structure for a gas-fueled ship according to the above-mentioned claim 6, the space is a space on which a cargo box is provided. .

  About the ceiling structure of the bunker station in a gas fueled ship, installing a flat plate under the hull member or attaching the hull member on the ceiling, the floor strength of the cargo weir disposed at the top of the bunker station The fuel cell's safety is ensured because it has a flush, flat ceiling structure where the fuel's volatile gas is not retained and the retained gas is easily diffused outboard. It has the effect of being able to do it.

FIG. 1 (a) is a side sectional schematic layout of a bunker station ceiling structure of a gas fueled ship according to the first embodiment, taking an LNG fueled automobile carrier as an example, and FIG. 1 (b) is a schematic plan sectional layout of the same. FIG. FIG. 2 (a) is a schematic plan cross-sectional view of the bunker station 2 of the LNG fueled automobile carrier 1 according to the first embodiment, FIG. 2 (b) is an elevation view seen from the drying side, FIG. ) Is a cross-sectional view showing the outline of the ceiling structure. FIG. 3 is a view schematically showing Example 2 of the bunker station structure 15 of the LNG fueled automobile carrier 1. FIG. 4 is a schematic view showing a Shore to Ship method of supplying LNG from an LNG tank installed on land to a fuel tank of an LNG fuel vessel. FIG. 5 is a view shown as FIG. 1 (FIG. 1) showing a first embodiment of the invention name “method for operating a marine vessel using LNG fuel” disclosed in Japanese Patent Application Publication No. 2011-503463. FIG. 6 is a cross-sectional view schematically showing the ceiling structure of the bunker station 111 shown in FIG.

  An embodiment will be described in detail based on the drawings as an embodiment for implementing a bunker station ceiling structure of a gas fueled ship according to the present invention.

FIG. 1 shows an example of a banker station ceiling structure of a gas-fueled ship according to the present invention as a dry bed (height from the full load line at the center of the ship to the heel side of the upper deck (vertical distance)) A first embodiment of a bunker station ceiling structure of a gas fueled ship according to the present invention will be described by taking an LNG fueled automobile carrier as an example. Fig.1 (a) is a side cross-section schematic layout taking the LNG fueled vehicle carrier ship which concerns on the present Example 1 as an example, FIG.1 (b) is the plane cross-section schematic layout. 1 (a) and 1 (b), reference numeral 1 is a car carrier, 2 is a bunker station at which a gas manifold provided on the free end is installed, 3 is an LNG storage tank, 4 is an LNG storage tank installation section 5 is an engine room, 6 is a tank top, 7 is a cargo dock, and 8 is a seafarer's residence area.
In LNG carriers such as this kind of large car carrier 1 with a large freeboard, RO-RO vessel, or RO-PAX vessel, the area near the LNG storage tank 3 for the purpose of suppressing the lift of the LNG fuel supply. The bunker station 2 is provided on the lower side of the bank.

  That is, this kind of large freeboard car carrier 1 is, like the bunker stations of many ships, at the height position of the berth wharf even when the loaded cargo is full for fuel supply (bunkering). At the placement position where the bunker station 2 as the fuel intake is located, and at the time of fuel loading (bunkering), the loaded LNG fuel is efficiently stored in the LNG storage tank 3 and the LNG The LNG fuel loading path to the LNG storage tank 3 and the inside of the engine chamber 5 from the LNG storage tank 3 are efficiently supplied from the storage tank 3 to the engine room 5 in which the ship main engine (not shown) is mounted. The respective fuel supply paths to the main engine of the engine are arranged at short positions close to each other. As a result, as shown in FIG. 1A, the bunker station 2 is disposed on the drying side in the vicinity of the LNG storage tank 3.

  The bunker station 2 in the LNG fueled automobile carrier 1 according to the first embodiment has a semi-closed structure similar to the prior art in which only part of the surface facing the quay shell of the automobile carrier 1 is opened. FIG. 2 is a view schematically showing the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment taking the car carrier 1 as an example, and FIG. 2 (a) is a diagram according to the first embodiment. Flat cross-sectional schematic view of the bunker station 2 of the LNG fueled vehicle carrier 1. FIG. 2 (b) is an elevation view of the opening of the bunker station from the side of the dry pit. FIG. 2 (c) is a cross section schematically showing the ceiling structure FIG. 7 is a view corresponding to FIG. 6 described above.

  2 (a) (b) (c), 2 is a bunker station, 10 is a schematic view of the bunker station in the LNG fueled vehicle carrier 1 according to the first embodiment, 12 is a ceiling plate of the bunker station 2, Reference numerals 13a and 13b denote a leaked LNG volatile gas, and 14 denotes a leaked LNG, which has been described as 216 in FIG. In addition, reference numeral 112 is an inlet pipe, 114 is a bunkering line, 123 (205) is a bunker connection line, 210 and 210 are ship-side outer plates, 211 is a joint portion, 212 is a drip tray, 213, 213, 213 are hull members for supporting cargo (loading vehicles) to be loaded, etc., 214 is the floor of the cargo weir 7 used in combination with the ceiling of the bunker station 2, and the members used in FIG. It explained with the same code. That is, in the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment, when the automobile carrier 1 is taken as an example, the bunker station 2 has a recess-like semi-closed opening of the weir side skin located on the full load water line. In the interior of the hull, the cargo weir 7 which enables loading of loading vehicles is also arranged in a layer directly above the bunker station 2. For this reason, the hull members 213, 213, and 213 need to have strength to withstand the cargo load of the loaded vehicle etc., and the hull members 213, 213, 213 are made of L-shaped steel having a cross section that can withstand the longitudinal strength in the longitudinal direction of the hull. Ru. However, this may be an appropriate steel material such as a cross-sectional H-shaped steel material in consideration of the loading cargo load.

  The joint portion 211, the inlet pipe 112, and the bunker connection line 123 (205) are disposed at appropriate positions on the ceiling plate 12 of the bunker station 2 by a crane (davit) (not shown) or the like. It is suspended so as to be able to move appropriately in 2 and is designed to work with bunkering of LNG fuel.

  Further, as is apparent from FIG. 2 (c), in the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment, the ceiling portion of the bunker station 2 is the hull member 213, 213, 213 Bottom portion of the hull member 213, 213, 213 bent in the L-shape below the ceiling portion so as to be disposed independently of the floor 214 of the cargo weir 7 disposed at the upper portion of the L-shaped straight end of Partially protrudes, and the space between the hull members 213, 213 and 213 is only opened downward, and when the volatile LNG gas rises to this area in the banker station 2, The LNG volatile gas was retained in the region, and there was no escape place, and the structure was such that the diffusion was hindered.

  Therefore, in the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment, the ceiling plate 12 which is flat on the L-shaped bent bottom portion of the hull members 213, 213, 213 is separated from the floor 214. By independently installing, the volatile gas is diffused to the outside without staying in the bunker station 2.

  Therefore, in the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment, the end portion of the ceiling plate 12 corresponds to the upper open end and the surface of the bunker station 2 as shown in FIG. It is configured as one structure, and the volatile LNG gas is easily diffused outboard without staying inside. The ceiling plate 12 may be a single plate or a combination of a plurality of plates. In addition, as a material of the ceiling plate 12, a steel plate having a thickness of about 10 mm, or a non-combustible / non-combustible plate member is attached to the lower side of the hull members 213, 213, 213. The members 213, 213 and 213 have a structure in which the volatile gas of the leaked LNG does not stay in the bunker station 2 despite being able to withstand the cargo load.

  Further, in the example shown in FIG. 2C, the ceiling plate 12 is disposed horizontally and flush as a structure for preventing the retention of dangerous gas, but this is because the temperature difference is utilized by utilizing the specific gravity difference of the volatile gas. The ceiling structure may have a predetermined slope so that the air naturally flows out of the boat and can be ventilated, and even if it is not flat, the gas can flow in the ship side direction where the volatile LNG gas diffuses outboard. It may be a ceiling having a mountain shape or an uneven shape. That is, the difference in specific gravity of gas means that natural gas at normal temperature is lighter than air, and therefore when diffused to the atmosphere, it should diffuse upward, and if the ceiling is inclined upward in the ship side direction, Natural gas from which LNG is volatilized will be lighter than air due to ambient temperature and will diffuse outboard along the sloped ceiling. The inclination utilizing the gas specific gravity difference means that the inclination may utilize the gas specific gravity difference to such ambient temperature.

  With such a ceiling structure, in the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment, even if fuel LNG leaks out and volatilizes and generates volatile gas in the bunkering operation, Staying of the ceiling portion of the bunker station 2 can be avoided.

Next, a second embodiment for carrying out a bunker station ceiling structure of a gas fueled ship according to the present invention will be similarly described based on the drawings.
FIG. 3 is a view showing an outline of Example 2 of the bunker station structure 15 of the LNG fueled automobile carrier 1 taking the LNG fueled automobile carrier 1 as an example similarly to Embodiment 1, and corresponds to FIG. 2 (c). .

  In FIG. 3, reference numeral 15 denotes a bunker station structure of the LNG fueled automobile carrier 1 according to the second embodiment, and 16, 16 and 16 constitute the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment. It is a hull member and corresponds to the hull members 213, 213 and 213 of the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the first embodiment described above. Further, reference numeral 17 denotes a box-like space (VOID) disposed above the hull members 16, 16, 16, and the space 17 is used for an equipment warehouse or the like, or the space 17 The floor 214 of the cargo cage 7 of the loaded vehicle is arranged on top.

  As apparent from FIG. 3, the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment is different from the bunker station structure 10 of the LNG fueled automobile carrier 1 according to the first embodiment in the present embodiment. In the bunker station structure 15 of the LNG fueled vehicle carrier 1 according to the second embodiment, the hull members 213, 213, 213 attached to the lower part of the bunker station structure 10 of the LNG fueled vehicle carrier 1 according to the first embodiment The shell members 16, 16, 16 are mounted on the ceiling.

  For this reason, in the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment, the hull members 213, 213, 213 are used as they are (that is, L-shaped steel members with L-shaped straight end upward) The hull structure of the gas-fueled vehicle carrier 1 according to the second embodiment is largely changed without providing the L-shaped bent bottom end on the lower side). That is, as for the car carrier 1 according to the first embodiment, the hull members 16, 16, 16 having an L-shaped cross section do not have a hull structure in which the bottom of the L is down, but the bottom of the L It is an embodiment based on the hull structure arranged in

  Therefore, in order to carry out the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment, the hull members 16, 16, 16 longitudinally extending in the longitudinal direction of the hull are the longitudinal direction of the hull of the car carrier 1. It has a hull structure in which an L-shaped bottom portion of an L-shaped cross-section steel material is disposed upward at the entire length. That is, the straight end of the L-shaped cross section is disposed at the lower position, and the flat end plate 12 is flush with the open upper end of the bunker station 2 at the straight end located at the lower position. The stuck structure is the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment.

  That is, in the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment, the ceiling plate 12 attached under the hull members 213, 213, 213 is the hull of the steel member of L-shaped cross section steel material. By using the members 213, 213, and 213 as the hull members 16, 16, and 16 arranged upside down from the first embodiment, in terms of strength, while the same strength as that in the prior art is given, By providing the flush ceiling plate 12 flush with the lower ends of the members 16, 16, 16, it is possible to prevent the retention of volatile gas in the ceiling area.

  As described above, also in the bunker station structure 15 of the LNG fueled automobile carrier 1 according to the second embodiment, since the ceiling plate 12 is the flush ceiling plate 12, the LNG in the case of bunkering is LNG in the LNG vessel. Even if it leaks and volatilizes, the volatilized LNG gasses 13a and 13b facilitate the outboard diffusion without staying in the ceiling. In addition, since the hull members 16, 16, 16 are simply provided on the ceiling, the ceiling surface of the bunker station 2 is flat while maintaining the same strength in terms of strength, and volatile LNG It is possible to prevent the retention of gas.

  The box-shaped void (VOID) 17 is disposed on the hull members 16, 16 and 16 in which the cross-sectional L-shaped steel material is disposed upside down, and is used for equipment storage or the like, or A strong floor 214 may be disposed on the top to be used as a cargo coffin such as a loaded vehicle.

  The present invention is applied to the ceiling structure of a bunker station having a semi-closed structure in which a gas manifold for loading gas fuel into a fuel tank of a gas fueled vessel is installed.

1 LNG Fueled Car Carrier 2 Bunker Station 3 LNG Storage Tank 4 LNG Storage Tank Installation Section 5 Engine Room 6 Tank Top 7, 7 Cargo Base 8 Crew Residence Area 10, 15 Bunker Station Structure 12 Ceiling Plate 13a, 13b Volatile LNG 16 16, 16 ship grain member 17 space 101 marine vessel 102 bunkering facility 103 LNG storage tank 104 pressure assembly circuit 105 heat exchanger 106 exhaust pipe 107 fuel supply line 108 heat medium circuit 109 cooling line 110 LNG tanker truck 111 bunker station 112 Inlet pipe 113 Emergency stop valve 114 Bunkering line 115 Two-way valve 116 Branch pipe 117 Branch pipe 118 Nozzle assembly 119 Purge connection 171 Power unit 191 Cooling line valve 192 Circulation pump 21 outlet pipe 122 emergency stop valve 123 bunker connection line 201 LNG ship 202 land LNG tank 203 quay / pier 204 bunkering supply device 205 bunkering line 211 joint portion 212 drip tray 213, 213, 213 hull member 214 floor of cargo shed 216 Leakage volatile LNG

Claims (7)

A bunker station with a semi-closed opening with a cross-sectional recess like a part of the hull outside the cargo hold under the upper cargo hold,
A flat and flush ceiling plate, under a plurality of ship grain members supporting the cargo hold, up to the upper open end of the semi-closed opening of the bunker station;
A bunker station ceiling structure of a gas fueled ship characterized by having:   The bunker station ceiling structure for a gas-fueled ship according to claim 1, wherein the ceiling plate is a ceiling plate provided separately from the cargo floor plate. The ceiling plate is characterized in that it is replaced by a flat ceiling plate which is flat and flush to the upper open end of the semi-closed opening of the bunker station, and the volatile fuel gas staying on the ceiling has a slope which naturally flows out A bunker station ceiling structure for a gas fueled ship according to claim 1. A flat ceiling plate which is flat and flush to the upper opening end of the semi-closed opening of the bunker station is a mountain-shaped or uneven-shaped ceiling plate capable of gas flow in the direction of the ship. The bunker station ceiling structure of the gas fueled ship described in 1. The bunker station ceiling structure of a gas-fueled ship according to claim 1, wherein the ceiling plate is a ceiling plate installed under a plurality of hull members supporting the cargo cage.   The bunker station ceiling structure of a gas fueled ship according to claim 5, wherein the upper portion of the ceiling plate is a vacant space.   The bunker station ceiling structure of a gas fueled ship according to claim 6, wherein the space is a space on which a cargo box is provided.

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