KR20190109771A - Ship - Google Patents

Abstract

This ship is provided on the hull 10, the bridge arranged on the upper side of the stern side of the hull 10, the main body 40 provided in the hull 10, and the upper deck 13 of the hull 10. A fuel tank 50 provided on the bow side of the bridge and having an outer circumferential surface extending along an axis O inclined downward toward the bow side while fuel of the cycle is stored, and in the fuel tank 50 A suction port is disposed in a portion on the bow side, and includes a pump 70 for sucking fuel.

Description

Ship

The present invention relates to a ship. This application claims priority in April 7, 2017 based on Japanese Patent Application No. 2017-076856 for which it applied to Japan, and uses the content for it here.

As a carrier for a ship, a carrier in which a cargo tank for storing liquefied gas such as LNG is arranged in a bow and tail direction is known (see Patent Documents 1 and 2, for example). These cargo tanks are a spherical rectangular tank. The spherical tank is provided so that the upper half part may protrude from the upper deck on the bow side than the bridge provided on the stern side of the ship.

In the carriers of Patent Literatures 1 and 2, the height of the spherical tanks arranged on the bow side is arranged on the stern side among the plurality of spherical tanks arranged in the fore and aft directions so as to secure a view from the bridge to the front surface of the water. The structure which makes it smaller than a spherical tank is disclosed.

Japanese Patent Laid-Open No. 9-24891 Japanese Laid-Open Patent Publication No. 61-241293

In the said ship, the liquefied gas of the cargo tank as cargo can also be used as fuel of the ship main | frame. However, there is a case where a fuel tank for storing fuel is provided separately from a cargo tank for storing liquefied gas from a request to separate cargo from fuel.

It is preferable that such a fuel tank is made large in volume as much as possible in order to ensure the cruising distance of a ship. Moreover, since it is necessary to provide a fuel tank in the limited space in a ship, there exists a restriction in the installation position of a fuel tank, and the size of the said fuel tank.

In particular, depending on the installation location of the fuel tank, there is a possibility of obstructing the view from the bridge to the water surface. On the other hand, in order to properly take out the fuel in the fuel tank by the pump, it is necessary to pay attention to the attitude of the fuel tank in order to secure the liquid level of the fuel at the pump installation position in the fuel tank.

This invention provides the ship which can ensure the size of a fuel tank, and the wickability of fuel, while ensuring the visual field from a bridge.

According to the first aspect of the present invention, a ship is provided on a hull, a bridge disposed on an upper portion of the stern side of the hull, a period provided in the hull, and a bow side of the bridge on the upper deck of the hull. And a fuel tank having an outer circumferential surface extending along an axis which is inclined downward toward the bow side while the fuel of the cycle is stored, and an inlet is disposed in a part of the bow side in the fuel tank to suck out the fuel. A pump is provided.

According to the ship of the said aspect, the outer peripheral surface of the fuel tank provided in the upper deck extends along the axis which inclines downward toward a bow side. For this reason, the volume of a fuel tank can be enlarged in the range which can ensure the said visual field, while ensuring the visual field from a bridge to the front of a bow.

In addition, since the pump draws out fuel from the portion of the bow side in the fuel tank which becomes the lower part of the inclination of the fuel tank, the head of the pump at the time of suction can be secured even when the fuel in the fuel tank is relatively small. have. For this reason, it is possible to reduce the remaining of the fuel in the fuel tank is not used up to the end.

According to the second aspect of the present invention, it is preferable that the upper tank line and the lower tank line constituting the outer circumferential surface of the fuel tank are parallel to the axis, respectively, in the line width direction.

Since the upper tank line is inclined downward toward the bow side, it can avoid obstructing the view from the bridge to the bow forward. In addition, since the lower tank line is inclined downward toward the bow side, when the fuel in the fuel tank is low, fuel is collected in front of the fuel tank. For this reason, the fuel collected in the front can be sucked out by the pump provided in the bow side in the fuel tank.

According to the 3rd aspect of this invention, the said upper tank line extends along the visual field request | requirement line which connects the bridge and the water surface of the front of the bow as seen from the line width direction.

Thereby, the volume of the fuel tank can be secured to the maximum in a range where the fuel tank does not obstruct the view from the bridge to the front of the bow, i.e., a range does not violate the rules concerning the view of the ship.

According to the 4th aspect of this invention, it is preferable that the outer peripheral surface of the said fuel tank has comprised the cylindrical surface shape centering on the said axis line.

Thereby, cost on fuel tank manufacture can be suppressed. In addition, a pressure resistant structure for storing fuel at high pressure can be manufactured at low cost.

According to the fifth aspect of the present invention, a cargo hold is formed in the hull and has a cargo tank disposed in the cargo hold to accommodate liquefied gas.

Even if a cargo tank for storing liquefied gas and a fuel tank for storing fuel are provided separately, as described above, the visibility from the bridge and the consumption of fuel in the fuel tank can be ensured while ensuring the maximum volume of the fuel tank. Can be.

According to the ship, it is possible to secure the size of the fuel tank and the fuel withdrawal while securing the view from the bridge.

1 is a side view of a transport ship according to an embodiment.
2 is an enlarged view of an essential part of FIG. 1.
3 is a cross-sectional view perpendicular to the axis of the fuel tank of the carrier ship according to the embodiment.
4 is a diagram for explaining a field of view request line.
5A is a cross-sectional view perpendicular to the axis of the fuel tank, illustrating a first modification of the fuel tank of the carrier ship.
5B is a cross-sectional view perpendicular to the axis of the fuel tank, illustrating a second modification of the fuel tank of the carrier ship.
5C is a cross-sectional view perpendicular to the axis of the fuel tank, illustrating a third modification of the fuel tank of the carrier ship.

EMBODIMENT OF THE INVENTION Hereinafter, the ship 100 which concerns on 1st Embodiment of this invention is demonstrated in detail with reference to drawings. The ship 100 of this embodiment is a liquefied gas carrier ship which transports liquefied petroleum gas (LPG) as liquefied gas.

As shown in FIG. 1, the ship 100 includes a hull 10, a bridge 20, a cargo tank 30, a cycle 40, a fuel tank 50, and a pump 70.

The hull 10 has a sheath side 11, a bottom 12, and an upper deck 13. The sheath side 11 is comprised by the pair of sheath side shells which comprise the left and right suspension side 11, respectively. The ship bottom 12 is comprised from the ship bottom outer board which connects these left and right string sides 11 from the bottom.

The upper deck 13 connects a pair of left and right sides 11 from above the bottom 12. The upper deck 13 is an exposure deck extending from the bow to the stern. The upper deck 13 extends in a horizontal direction. In the upper deck 13, the stern side of the said ship 100 descends according to the navigation state of the ship 100, and also the upper deck 13 itself may incline downward.

The hull 10 is formed by the sheath side 11, the bottom 12, and the upper deck 13 in the substantially box-shaped cross-sectional shape orthogonal to a bow and tail direction which forms a space inside. The part of the stern side in the said ship body 10 becomes the engine room 14. The part on the bow side than the engine room 14 in the ship body 10 becomes the cargo hold 15 partitioned by the engine room 14 and a partition.

The bridge 20 is provided to extend upward from the top of the hull 10. The bridge 20 is provided on the stern side in the upper part of the ship body 10, and is provided above the engine room 14. As shown in FIG. The bridge 20 forms a plurality of layers. In the upper floor of the bridge 20, a cockpit 21 for manipulating the ship 100 is provided. The said cockpit 21 is comprised so that the front of the ship 100 can be viewed from a high place.

The cargo tank 30 is provided in the cargo hold 15 of the ship body 10 so that a plurality (3 in this embodiment) may be arrange | positioned in a bow and tail direction. As for the part between adjacent cargo tanks 30, the partition which partitions the compartment in which each cargo tank 30 is accommodated is provided.

이하로 함으로써, 상압에서 액화된다. 이로 인하여, 선박(100)에는, LPG를 저온 액화 상태로 유지하기 위한 도시하지 않은 증발 가스 처리 장치가 마련되어 있다. 증발 가스 처리 장치로서는, 재액화 장치가 채용되고 있다.The cargo tank 30 of this embodiment is a rectangular tank comprised by joining flat tank wall parts mutually. In the cargo tank 30, LPG as cargo is stored at atmospheric pressure and low temperature. In addition, the "normal-pressure low-temperature state" means the state in which the liquefied state of LPG is maintained only by making it low temperature without pressurizing LPG. LPG is about -46

By making it below, it liquefies by normal pressure. For this reason, the ship 100 is provided with the evaporation gas processing apparatus which is not shown in figure for maintaining LPG in low temperature liquefaction state. As the evaporative gas treatment apparatus, a reliquefaction apparatus is employed.

이하의 온도)가 유지되고 있다.The reliquefaction apparatus cools the evaporated gas discharged | emitted by LPG in the cargo tank 30 by the external heat, and liquefies again outside the cargo tank 30. The gas liquefied in this way is returned to the cargo tank 30 as LPG. This results in a low temperature liquefaction state in LPG (eg -46

The following temperature) is maintained.

The cycle 40 is disposed in the engine room 14 in the hull 10. The cycle 40 of this embodiment is driven with LPG as fuel. Here, the fuel of the cycle 40 is not limited to LPG, but may be combined (bifuel), mixed (dual dual), or the like with LPG and other fuels. By the drive of the period 40, the screw 41 provided below the stern of the ship body 10 rotates.

Next, the fuel tank 50 is demonstrated with reference to FIG. The fuel tank 50 of this embodiment stores the LPG used as the fuel of the period 40. The fuel tank 50 is provided on the upper deck 13. In this embodiment, it is provided, for example on the upper deck 13 above the cargo tank 30 of the center among the cargo tanks 30 arrange | positioned three in the bow and tail direction.

The fuel tank 50 can store LPG in a high pressure normal temperature state. For this reason, the fuel tank 50 is comprised by the pressure-resistant container. In addition, a "high pressure normal temperature state" means the state in which the liquefied state of LPG is maintained only by pressurizing without cooling LPG.

The fuel tank 50 has a cylinder portion 51 and a pair of lid portions 52. The cylinder part 51 has comprised the cylinder shape centering on the axis line O. As shown in FIG. In this embodiment, as shown in FIG. 3, the cross-sectional shape orthogonal to the axis line O of the cylinder part 51 is circular, ie, the cylinder part 51 has comprised the cylindrical shape. The thickness of the wall constituting the cylinder portion 51 is constant. The dimension of the cylinder part 51 in the axis line O direction is larger than the diameter of the cylinder part 51. That is, the fuel tank 50 makes the axis O direction the longitudinal direction.

The pair of cover parts 52 are provided so that the ends of the cylinder part 51 in the axial line O direction may be closed, respectively. For example, the cylinder part 51 has comprised the curved surface which protrudes outward from the both ends of the cylinder part 51, Preferably, it forms the spherical shape. Thus, the fuel tank 50 is comprised by the cylindrical part 51 which forms a cylindrical shape, and a pair of cover part 52 which forms a curved surface, and achieves pressure resistance by forming a cylindrical shape as a whole. The outer peripheral surface centering on the axis line of the fuel tank 50 also forms the cylindrical surface. The volume of the fuel tank 50 is sufficiently smaller than the volume of the cargo tank 30.

Such a fuel tank 50 is provided on the upper deck 13 so that the said axis | shaft O may incline downward as it goes to a bow side. That is, the fuel tank 50 extends along the axis O which goes downward as it goes to the bow side. The axis O coincides with the fore and aft direction when viewed from the plane of the ship 100. The pair of fuel tanks 50 may be arrange | positioned so that the axis | shaft O of each other may be parallel, when spaced apart in the line width direction and planar view.

The axis O arranged above the upper deck 13 is inclined so as to approach the upper deck 13 with respect to the upper deck 13 toward the bow side. The angle of inclination of the axis O relative to the upper deck 13 is equal to the axis O even when the stern side of the vessel 100 and the upper deck 13 is lowered at the time of sailing of the vessel 100. With respect to the bow side, the inclination is maintained to be downward.

As shown in FIG. 2, the line which connects the upper end of the outer peripheral surface of the cylinder part 51 of the fuel tank 50 in each bow direction direction is made into upper tank line La. The upper tank line La forms the upper outline when seen from the side surface of the ship 100. The line which connects the lower ends of the outer peripheral surface of the cylinder part 51 of the fuel tank 50 in each fore and aft direction is made into the lower tank line Lb. The lower tank line Lb forms a downward contour when viewed from the side of the ship 100.

These upper tank lines La and lower tank lines Lb are inclined downward as they face the bow side. In this embodiment, the upper tank line La and the lower tank line Lb are parallel to the axis O. As shown in FIG. Since the thickness of the cylinder part 51 which comprises the fuel tank 50 becomes constant, the lower tank line Lb is inclined and the bottom surface which partitions the space in the fuel tank 50 is lower tank line Lb. It is inclined equally.

The inclined posture of the fuel tank 50 as described above is, for example, made of a tank support 60 supporting the inclined tank. The tank support 60 supports the fuel tank 50 on the upper deck 13 so that the axis O of the fuel tank 50 is inclined as described above. For example, in this embodiment, the fuel tank 50 is supported by the upper end of the bow side support part 61 and the stern side support part 62. As shown in FIG. The bow side support part 61 and the stern side support part 62 are respectively fixed on the upper deck 13, and the upper end of the stern side support part 62 is located above the upper end of the bow side support part 61. As shown in FIG. Thus, the inclination posture of the fuel tank 50 is maintained by the difference of the height of the stern side support part 62 and the bow side support part 61. As shown in FIG. In addition, the structure of the tank support part 60 is not limited to the said structure, As long as it can support the fuel tank 50 in inclined position on the upper deck 13, another structure may be sufficient.

Here, with reference to FIG. 4, the inclination attitude | position of the fuel tank 50 is demonstrated in detail. The fuel tank 50 is arrange | positioned on the upper deck 13 so that it may enter below the visual field demand line Lv shown in FIG. Here, the field-of-view request line Lv is the shorter of the total length Loa of the ship 100 from the cockpit 21 in the bridge 20 and the bow on the forward surface of the bow, or 500 m. An imaginary line connecting the positions.

That is, in the ship 100, the structure, such as the fuel tank 50 on the upper deck 13, by the rule, doubles or 500m of the total length from the bow of the front surface of the bow from the cockpit 21 of the bridge 20. As a requirement, it does not disturb the visual field to the position of the shorter one. More specifically, the proximal end of the bridge 20 side of the viewing request line Lv is positioned at 750 mm from the front wall surface in front of the cockpit 21 toward the stern side and 1800 mm from the floor surface. It is determined by location. If the fuel tank 50 is arrange | positioned under the said visual field request line Lv, ie, if the upper tank line La of the fuel tank 50 is not located beyond the visual field request line Lv, the said Meet the requirements of the rules.

In order to increase the volume of the fuel tank 50 as much as possible, it is preferable that the upper tank line La of the fuel tank 50 is arrange | positioned as close as possible to the visual field request | requirement line Lv. The upper tank line La of the fuel tank 50 may be parallel to the visual field request line Lv. The upper tank line La of the fuel tank 50 may extend in accordance with the visual field request line Lv. That is, the upper tank line La of the fuel tank 50 should just extend along the visual field request line Lv.

Next, the pump 70 will be described. As shown in FIG. 2, the pump 70 serves to pump the LPG in the fuel tank 50 to the cycle 40. A drive unit such as an electric motor for driving the pump 70 may be provided in the fuel tank 50 or may be provided outside the fuel tank 50. In particular, since the LPG stored in the fuel tank 50 has insulation, there is no problem even if a driving unit is provided in the fuel tank 50.

The pump 70 has a suction port at a portion of the bow side in the fuel tank 50. In particular, in this embodiment, the suction port of the pump 70 is arrange | positioned in the vicinity of the boundary of the cylinder part 51 in the space in the fuel tank 50, and the cover part 52 on the bow side. It is preferable that the suction port of the pump 70 is provided in the position located most downward in the space in the fuel tank 50, or near the said location. It is preferable that the suction port of the pump 70 is provided corresponding to the location where the lower tank line Lb of the fuel tank 50 is located in the lowermost part. The fuel extracted from the pump 70 is transferred to the cycle 40 through the pipe 71.

Next, the operation of the present embodiment will be described.

In this embodiment, the outer peripheral surface of the fuel tank 50 provided in the upper deck 13 extends along the axis O which inclines below toward a bow side. For this reason, the volume of the fuel tank 50 can be enlarged in the range which can secure the said visual field, while ensuring the visual field from the cockpit 21 of the bridge 20 to the front of a bow.

That is, if the fuel tank 50 is inclined toward the bow side, it can be suppressed from obstructing the view looking down toward the water surface from the cockpit 21 of the bridge 20 toward the bow side. In addition, since the stern side of the fuel tank 50 is positioned upward by the inclined posture, the fuel tank 50 occupies a space that has not been used so far and which does not obstruct the field of view. For this reason, the effective volume which the fuel tank 50 can store fuel can be expanded.

Moreover, since the pump 70 draws out fuel from the part of the bow side in the fuel tank 50 used as the lower part of the inclination of the fuel tank 50, when the fuel in the fuel tank 50 becomes comparatively small Even in this case, the head of the pump 70 at the time of suction can be secured. That is, as shown in FIG. 2, when the remaining amount of LPG in the fuel tank 50 decreases, the LPG gathers on the bow side of the fuel tank 50 in accordance with the inclination of the fuel tank 50. As the pump 70 draws out the collected LPG through the suction port, the fuel in the fuel tank 50 cannot be used up to the end, thereby reducing the remaining. In other words, it is possible to ensure the withdrawal of fuel by the pump 70.

Here, if the inclination attitude of the fuel tank 50 is opposite to this embodiment, that is, when the axis O of the fuel tank 50 is inclined downward as it goes to the stern side, the fuel tank ( The athlete's side of 50) is located above. In this case, there is a possibility of obstructing the view from the cockpit 21 of the bridge 20. In addition, in order to secure a visual field, the fuel tank 50 must be installed at the stern side more, and the freedom of installation is impaired. In addition, when the fuel tank 50 is to be provided on the bow side so that the view from the bridge 20 is not obstructed, the fuel tank 50 itself needs to be made small, thereby reducing the effective volume.

In contrast, when the fuel tank 50 is disposed so as to extend downward along the axis O of the fuel tank 50 toward the bow side as in the present embodiment, the fuel tank 50 is not obstructed in the field of view. Can be arranged on the front side of the upper deck 13, that is, the degree of freedom of arrangement of the fuel tank 50 on the deck can be improved. Moreover, the volume of the said fuel tank 50 can be enlarged to the maximum in the range which does not obstruct the visual field from the bridge 20.

Moreover, especially in this embodiment, the upper tank line La and the lower tank line Lb of the fuel tank 50 are parallel to the inclination axis | shaft O. In addition, in FIG. That is, since the upper tank line La is inclined downward toward the bow side, it is possible to further avoid obstructing the view from the bridge 20 toward the bow. In addition, since the lower tank line Lb is inclined downward toward the bow side, the bottom surface constituting the space inside the fuel tank 50 is also inclined in the same manner. For this reason, when LPG in the fuel tank 50 decreases, the fuel in the fuel tank 50 is guide | induced to the bow side by the bottom surface, and LPG can be collected in the bow side part in the said fuel tank 50. FIG. . For this reason, the fuel collected in the front can be sucked out with high efficiency by the pump 70 provided in the bow side in the fuel tank 50. FIG.

In addition, since the upper tank line La extends along the line request line Lv connecting the bridge 20 and the water surface in front of the bow in the line width direction, the fuel tank 50 satisfies the required rule. The volume of the fuel tank 50 can be secured to the maximum in the range which does not obstruct the view from the bridge 20 to the front of the bow.

Moreover, since the fuel tank 50 has a cylindrical shape, the cost in manufacturing the fuel tank 50 can be suppressed. In addition, a pressure resistant structure for storing fuel at high pressure can be manufactured at low cost.

And even if the cargo tank 30 which stores LPG as a cargo, and the fuel tank 50 which stores LPG as fuel are provided separately like this embodiment, the volume of the fuel tank 50 is made as mentioned above. While ensuring as much as possible, the visibility from the bridge 20 and the withdrawal of the fuel in the fuel tank 50 can be ensured.

As mentioned above, although embodiment of this invention was described, this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of the invention.

For example, you may employ | adopt the fuel tank 150 shown to FIG. 5A as a 1st modification. In the fuel tank 150 of the first modification, two cylindrical portions 151 each extending in the axis O direction are arranged in parallel with each other and have a shape in which they are coalesced in a part of the circumferential direction.

Moreover, you may employ | adopt the fuel tank 160 shown in FIG. 5B as a 2nd modification. The fuel tank 160 of the second modification has an upper plate portion 161 and a lower plate portion 162 extending along the axis O and facing each other in the vertical direction. Both sides of the line width direction of the upper plate portion 161 and the lower plate portion 162 are connected in an arc shape by the curved portion 163.

In addition, you may employ | adopt the fuel tank 170 shown in FIG. 5C as a 3rd modification. The fuel tank 170 of the 3rd modification is comprised by the square cylinder part 171 of the cross section square shape extended along the axis O. As shown in FIG.

In any of the first to third modified examples, the fuel tanks 150, 160, and 170 are included in the outer circumferential surface extending along the axis O inclined downward toward the bow side and the upper tank included in the outer circumferential surface. It has a line La and the lower tank line Lb. Therefore, the same effect as that of embodiment is shown.

In the embodiment, the fuel stored in the fuel tank 50 is LPG, but other liquefied gas such as LNG may be used as the fuel. In addition, the cargo stored in the cargo tank 30 is not limited to LPG, Other liquefied gas may be sufficient. The cargo stored in the cargo tank 30 may be a liquid or a material other than liquefied gas.

Industrial availability

According to this ship, it is possible to secure the size of the fuel tank and the fuel withdrawal while securing the view from the bridge.

10 hull
11 strings
12 bottom
13 upper deck
14 engine room
15 cargo hold
20 bridges
21 cockpit
30 cargo tanks
40 cycles
41 screw
50 fuel tank
51 tube
52 Cover
60 Tank Support
61 Player Side Supports
62 Stern Side Supports
70 pumps
71 piping
100 ships
150 fuel tank
151 Cylindrical section
160 fuel tank
161 Top plate
162 Lower Plate
163 curved section
170 fuel tank
171 square tube
O axis
Lv sight request line
La upper tank line
Lb lower tank line

Claims (5)

Hull,
A bridge disposed above the stern side of the hull;
A period provided in the hull,
A fuel tank provided on the bow side of the bridge on the upper deck of the hull and having an outer circumferential surface extending along an axis which is inclined downward toward the bow side while fuel of the cycle is stored;
A ship in which a suction port is arranged at a portion of the bow side in the fuel tank, and having a pump for sucking the fuel. The method of claim 1,
A vessel in which an upper tank line and a lower tank line constituting the outer circumferential surface of the fuel tank are parallel to the axis, respectively, as viewed in line width direction. The method of claim 2,
And the upper tank line extends along a line of sight request line connecting the bridge and the water surface in front of the bow, seen in line width direction. The method of claim 2 or 3,
The outer peripheral surface of the said fuel tank has comprised the cylindrical surface centered on the said axis line. The method according to any one of claims 1 to 4,
Cargo hold is formed in the hull,
And a cargo tank disposed within said cargo hold for containing liquefied gas.

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