KR20220063069A - Tank for vessel - Google Patents

Abstract

A tank for a ship according to an embodiment of the present invention comprises: a tank body (201); an outlet (202) through which fuel in the tank body (201) is discharged; and flow control members (400, 401, 402, 403, 404, 405, 406, 407, 408) installed to surround the outlet (202) and formed with a through part (S, 10) through which the fuel moves, wherein the fuel moves inside and outside of the flow control members (400, 401, 402, 403, 404, 405, 406, 407, 408) through the through part (S, 10). The present invention is to provide the tank for a ship capable of stably supplying fuel into a fuel supply pipe by maintaining a stable fuel level near the outlet in the tank even when the ship moves.

Description

Tank for ship {TANK FOR VESSEL}

The present invention relates to a tank, and more particularly, to a tank for a ship capable of stably supplying fuel even in the movement of a ship.

In general, petroleum resources used as transportation fuels for automobiles and ships and as various fuels used domestically and abroad are gradually being depleted, and the use of liquefied gas as an alternative energy is increasing according to rising oil prices and stricter environmental regulations.

For example, the liquefied gas includes liquefied natural gas (liquefied natural gas, LNG) or liquefied propane gas (liquefied propane gas, LPG), and the like.

The liquefied gas is stored in a liquefied gas storage tank and moved in a state in which the volume is reduced by liquefying the gas for ease of movement and storage.

The liquefied gas stored in the liquefied gas storage tank may be supplied to the outside through a pump, and an outlet provided for discharging fuel and a fuel supply pipe connected to the outlet are provided at the bottom of the liquefied gas storage tank.

On the other hand, when the ship is in a stable steady state, the liquid level of the fuel stored in the liquefied gas tank is stable, so there is no problem in fuel supply through the outlet, the fuel supply pipe, and the pump.

However, when the movement of the vessel, such as rolling, pitching, yaw, etc. occurs, the liquid level of the fuel stored in the liquefied gas storage tank changes, and the fuel discharge to the outlet and the fuel supply pipe may not be normally performed.

Such a problem is more likely to occur according to the movement of the vessel when the fuel is relatively less filled than when the fuel is filled in the liquefied gas storage tank, and the liquefied gas does not flow into the outlet and fuel supply pipe normally and remains in the tank. do.

In addition, if the situation in which the liquefied gas is not normally supplied into the outlet and the fuel supply pipe continues, damage to equipment such as a pump connected to the fuel supply pipe may occur.

Korean Patent Publication No. 10-2007961 (liquefied gas storage tank, 2019.08.06)

Accordingly, an object of the present invention is to provide a tank for a ship capable of stably supplying fuel into a fuel supply pipe by maintaining a stable fuel level near an outlet in the tank even when the ship moves.

A tank for a ship according to an embodiment of the present invention includes a tank body; an outlet through which fuel in the tank body is discharged; and a flow control member installed to surround the outlet and having a penetration portion through which the fuel moves, wherein the fuel moves inside and outside the flow control member through the penetration portion .

In addition, the through-portion may include a plurality of through-holes, and the through-holes may be formed under the flow control member.

In addition, the flow control member, the body; and a plurality of support legs protruding from the lower end of the main body, wherein the plurality of support legs are arranged at regular intervals along the lower end of the main body to form the through portion between the plurality of support legs.

In addition, the bottom of the tank body, further comprising a groove formed along the main body of the flow control member, the plurality of support legs may be coupled to be inserted into the groove to move along the groove.

In addition, the groove includes a first groove and a second groove that are arranged concentrically, and the plurality of support legs are coupled to the first support legs to move, and to move by being coupled to the second grooves. It may include a second support leg.

In addition, while the second supporting leg overlaps the first supporting leg, the size of the penetrating portion may vary according to a distance between the first supporting leg and the second supporting leg.

In addition, it may further include a cover installed on the through portion to open and close the through portion.

In addition, the flow control member, the first body having a first width; and a second body connected to a lower portion of the first body and having a second width greater than that of the first body.

In addition, the through portion may be located in the second body.

In addition, the flow control member may include a plurality of bodies having different widths, and the plurality of bodies may overlap to form concentric circles.

In addition, the plurality of bodies may have a lower height as they are adjacent to the center of the flow control member.

In addition, the through portions formed in the plurality of adjacent bodies may be positioned to be shifted from each other.

In addition, one end is fixed to the inner surface of the flow control member, the other end further includes a plurality of delay plates projecting from the inner surface to the opposite inner surface through the center of the flow control member, the width of the delay plate is the flow It may be smaller than the width of the control member.

In addition, the plurality of delay plates are positioned at regular intervals along the height direction of the flow control member, and the adjacent delay plates may be coupled to opposite inner surfaces with respect to the center of the flow control member.

In addition, it may further include a storage tank formed in the outlet.

If the flow control member is installed in the tank as in the present invention, even if the movement of the ship occurs, the fuel level is maintained for a certain period of time near the outlet where the fuel is discharged, and a certain amount of fuel can be stably supplied to the fuel supply pipe. .

1 is a schematic view of a ship including a tank for a ship according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the tank for ships installed in FIG. 1 .
Figure 3 is a schematic view of the flow control member installed in the tank for ships of Figure 2;
4 to 14 are views for explaining a flow control member according to another embodiment of the present invention.
15 is a view for explaining a tank for a ship according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a schematic view of a vessel including a vessel tank according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the vessel tank installed in FIG. 1, and FIG. 3 is a flow control member installed in the vessel tank of FIG. It is a schematic drawing.

1 and 2, the ship 100 according to an embodiment of the present invention includes a tank 200 installed on the deck 101, a cargo tank 300 installed under the deck 101. include

The tank 200 may store liquefied gas as a fuel as a fuel tank, and the cargo tank 300 may store liquefied gas as cargo for transportation, but is not limited thereto. The tank 200 as a tank may be installed in a predetermined space within the hull under the deck 101 rather than on the deck 101. Liquefied gas is a gas in a liquefied state by compression or cooling, and may include liquefied natural gas (LNG), liquefied petroleum gas (LPG), or a mixed liquefied gas thereof. The liquefied gas may be a liquefied gas containing a high content of methane and a plurality of heavy hydrocarbons such as ethane, propane, butane and pentane, but is limited thereto No, it may contain hydrogen or ammonia.

The liquefaction temperature of the liquefied gas may be cryogenic at normal pressure. Therefore, in order to prevent generation of boil off gas due to evaporation of the liquefied gas, the internal temperature of the tank may be maintained at a constant temperature. For example, the liquefied gas may be maintained at a temperature lower than the liquefaction temperature to remain in a liquid state.

The tank 200 and the cargo tank 300 may include a cryogenic liquefaction tank containing a material capable of withstanding cryogenic temperatures because it is necessary to store the cryogenic liquid gas. Materials that can withstand cryogenic temperatures may include aluminum alloys, nickel alloys, and stainless alloys.

In addition, the tank 200 and the cargo tank 300 may include a heat insulating part including a material having a cooling performance that can maintain a cryogenic temperature. The tank 200 and the cargo tank 300 may include the above-described tank, but is not limited thereto, and may include any tank as long as it can store liquefied gas. For example, the tank 200 and the cargo tank 300 may be a tank having a single shell or a tank having a double shell.

Specifically, the shell forms a space for storing the liquefied gas inside, and may be made of a metal capable of withstanding the temperature of the liquefied gas stored at a low temperature. For example, the inner shell is made of a metal having excellent low temperature properties such as aluminum, stainless steel, 5 to 9% nickel steel, or a low temperature composite material such as glass metal reinforced epoxy, and in one embodiment of the present invention, It may have various shapes including a shape having a cross-section and other polyhedrons.

In addition, for the manufacture of the shell, a metal or material having a small coefficient of thermal expansion may be selected in order to reduce stress generated in thermal contraction due to cryogenic temperature. The tank 200 and the cargo tank 300 may be in the form of an independent container in the ship, but may be in the form of a membrane corresponding to the cargo hold of the ship itself.

2 and 3 , the tank 200 includes a tank body 201 and an outlet 202 through which fuel in the tank body 201 is discharged. In addition, a flow control member 400 installed by welding on the inner wall of the tank body 201 is installed to surround the periphery of the discharge port 202 through which the fuel is discharged.

The fuel in the tank 200 is discharged to the fuel supply pipe 211 through the outlet 202 , and a fuel supply pump 210 for pumping fuel, etc. may be connected to the fuel supply pipe 211 .

The flow control member 400 maintains a constant amount of fuel supplied to the outlet 202 and the fuel supply pipe 211 so that fuel can be stably supplied to the fuel supply pipe 211 without interruption.

The flow control member 400 may have a hollow inside to surround the outlet 202, for example, a cylinder, a prism shape. Hereinafter, a circular column will be described as an example.

The lower end of the flow control member 400 is fixed to the inner wall of the tank body 201 by welding, and a penetration portion through which the fuel can move in and out of the flow control member 400 may be formed in the lower portion of the flow control member 400 . there is. The through portion may be a through hole 10 formed in the lower portion of the flow control member 400 . The through holes 10 may be formed in plurality at regular intervals along the circumference of the flow control member 400 . Fuel may be moved into and out of the flow control member 400 through the through hole 10 . Although the through hole 10 shown in FIG. 3 is formed to be spaced apart from the lowermost portion of the flow control member 400 by a certain portion, the through hole 10 is formed at the lowermost portion so that the through hole 10 overlaps with the tank body 201 or It is preferable to contact In addition, although it is shown that the through hole 10 is formed in a concentric circle, it is not limited thereto, and may be an elliptical or irregular opening shape. Considering the installation purpose of the flow control member 400 , the through hole 10 is ), it is preferable to form a fine size.

As in one embodiment of the present invention, when the flow control member is installed, even when various movements of the vessel such as rolling, pitching, and yaw occur, fuel can be stably supplied to the outlet 202 and the fuel supply pipe 211 .

When a vessel movement such as rolling, pitching, or yaw occurs, the vessel is tilted, and accordingly, the fuel level stored in the tank 200 changes according to the movement of the vessel. At this time, a phenomenon in which the fuel is tilted to one side may occur, so that the fuel supplied through the outlet 202 and the fuel supply pipe 211 may not be stable, and this may occur more when the fuel in the tank 200 is insufficient there is.

When the flow control member is installed as in the embodiment of the present invention, the fuel is trapped in the flow control member for a predetermined time, so that even if the movement of the vessel occurs, the flow control member stably flows through the outlet 202 and the fuel supply pipe 211 . fuel can be supplied.

At this time, it is preferable that the size of the through hole 10 formed in the flow control member 400 is small so that the fuel stored in the flow control member 400 is not easily discharged out of the flow control member 400 . That is, by delaying the time when the fuel in the flow control member 400 is discharged out of the flow control member 400 so that the fuel maintains a constant level in the flow control member for a predetermined time, the outlet 202 and the fuel supply pipe stably (211) can be fueled.

4 to 14 are views for explaining a flow control member according to another embodiment of the present invention.

Since the flow control member installed in FIGS. 4 to 14 is mostly the same as the flow control member of FIG. 3, only other parts will be described in detail.

As shown in FIG. 4 , the flow control member 401 according to another embodiment of the present invention may include a main body 41 and a plurality of support legs 42 connected to the lower end of the main body 41 . . The support legs 42 may be disposed at regular intervals along the lower end of the body 41 to form a through-portion through which fuel moves. The support legs 42 are for forming a passage through which the fuel moves by separating the main body 41 from the inner wall of the tank body 201, and the distance S between the support legs 42 may be adjusted according to the amount of fuel. . The support legs 42 may be fixed to the inner wall of the tank by welding.

The flow control member shown in FIGS. 5 and 6 is mostly the same as the flow control member shown in FIG. 4, and unlike the support leg of FIG. 4, the support leg may be coupled to move.

5 and 6, the flow control member 402 according to another embodiment of the present invention has a main body 41, a plurality of support legs 43 and 44 connected to the lower end of the main body 41. may include

At the lower end of the tank body 201 , grooves 5 and 6 may be formed along the lower end of the main body 41 , and upper portions of the support legs 43 and 44 may be fitted into the grooves 5 and 6 .

The support legs 43 and 44 may be installed to be movable along the grooves 5 and 6 by using the grooves 5 and 6 formed at the lower end of the tank body 201 as a rail. At this time, the grooves 5 and 6 include a first groove 5 and a second groove 6 , and the support legs 43 and 44 are the first support legs 43 moving along the first groove 5 . ) and a second support leg 44 moving along the second groove 6 . The first support leg 43 and the second support leg 44 moving along the first groove 5 and the second groove 6 may be alternately disposed, and may overlap each other while moving.

Accordingly, when the second support legs 44 are positioned between the first support legs 43 as shown in FIG. 5 , all passages through which the fuel moves may be blocked. In addition, when the second support leg 44 (or the first support leg 43) is moved to overlap the first support leg 43 (or the second support leg 44) as in FIG. 6, the first The gap (S) between the support legs (43) is increased to form a passage through which the fuel moves.

In this way, when the movable support legs 43 and 44 are installed, the spacing S between the support legs 43 and 44 can be easily adjusted according to the size of the vessel and the size of the tank, and when manufacturing the tank of the vessel, the Without the need to separately produce the flow control member 402 according to the size, by adjusting the gap (S) at the tank manufacturing site of the ship, that is, the first supporting leg 43 and the second supporting leg 44 are required After adjusting the interval, it can be fixedly installed on the inner wall of the tank by welding, thereby increasing the tank manufacturing efficiency or production efficiency of the vessel.

In addition, the amount of fuel trapped in the flow control member 402 can be adjusted by adjusting the amount of fuel discharged through the gap (S), and the gap (S) is formed the same or adjusted to different sizes as in FIG. 6 . can be

7 and 8, in the flow control members 403 and 404 according to another embodiment of the present invention, a cover 50 for opening and closing the fuel passage may be installed.

The cover 50 may be installed between the support legs 42 as in FIG. 7 , or in a through hole as in FIG. 8 , and may be coupled through a hinge 51 . The cover 50 may be opened (refer to the arrow of FIG. 7 ) according to the direction of movement of the fuel so that the movement of the fuel is not hindered. That is, when the fuel moves from the outside into the flow control members 403 and 404, the cover 50 may be opened to the inside of the flow control members 403 and 404, and the fuel flows inside the flow control members 403 and 404. When moving from the to the outside, the cover 50 may be opened to the outside.

In this way, when the cover 50 is installed, when the fuel moves from the inside to the outside of the flow control members 403 and 404, the cover 51 must be opened by the force that the fuel moves, so the fuel moves (or the amount of fuel) ) may vary depending on the degree of opening, and as the moving force is reduced, the force pushing the cover 50 is weak and the open size is small, which further increases the time for the fuel to be discharged to the outside.

9 and 10, the flow control members 405 and 406 according to another embodiment of the present invention are connected to the lower portion of the first body 45 and the first body 45 having a first width D1. and a second body 46 having a second width D2. The lower end of the second body 46 may be fixed to the inner wall of the tank, and the second width D2 may be greater than the first width D1 . A passage of fuel, for example, the through hole 10 may be formed in the second body 46 . As shown in FIGS. 3 to 8 , the fuel movement path may be formed in various shapes.

As such, when the second body 46 is formed to be wider than the width of the first body 45, the contact area between the fuel located in the second body 46 and the inner wall of the tank increases, and the surface tension thereof increases. fuel flow is reduced.

Meanwhile, in FIG. 9 , the lower portion of the second body 46 is located on the same virtual horizontal plane, but as in FIG. 10 , the lower portion of the second body 46 is formed along the inner curved surface of the tank body 201 to form an arc. (弧) may have a shape. In addition, in the case of FIGS. 9 and 10, the connection part of the first body 45 and the second body 46 was configured in a lower inclined shape, but the connection part was configured in the same shape as the arc shape of FIG. 46) can further maximize the surface tension.

11 and 12, in the flow control member 407 according to another embodiment of the present invention, a delay plate 53 for delaying the flow of fuel may be further installed.

The delay plate 53 may be installed on the inner wall of the flow control member 407, and may be installed at regular intervals along the height (H) direction of the flow control member 407, and the two adjacent delay plates 53 are It may be fixed to opposite inner surfaces of the flow control member 407 opposite to each other based on the center of the flow control member (407).

The width D3 of the retardation plate 53 is smaller than the width (or diameter) D4 of the flow control member 407 , so that a passage through which the fuel moves from the top to the bottom of the flow control member 407 may be formed. In order to increase the movement path of the fuel, the retardation plate 53 may be alternately connected to the inner surface opposite to the center of the flow control member 407. At this time, the movement path of the fuel flows along the delay plate 53 and zigzags. It can be shaped (see arrow in FIG. 11 ).

As in the present invention, when the delay plates 53 are connected to each other alternately, the fuel does not move directly from the top to the bottom of the flow control member 407, but moves along the movement path formed by the delay plate 53, It is possible to increase the time the fuel stays in the flow control member 407 .

13 and 14, the flow control member 408 according to another embodiment of the present invention has a plurality of bodies (61, 62, 63, 64, 65) having different diameters to form concentric circles. can be nested.

A passage through which the fuel moves, for example, a through hole 10 may be formed in the lower portion of each body 61 , 62 , 63 , 64 , 65 , and the through holes 10 of neighboring bodies are arranged to be staggered from each other can be When the through-holes are positioned at the same angle (or in the concentric direction), the fuel movement path length is about a radius, and the fuel movement path becomes shorter. Accordingly, by arranging the adjacent through-holes 10 to cross each other to increase the movement path of the fuel (refer to the arrow in FIG. 14 ), the time the fuel stays in the flow control member 408 can be increased.

In addition, the body adjacent to the center of the flow control member 408 may be formed with a relatively lower height (H) than the body located far from the center, and may be gradually lowered toward the center. That is, the body 65 located at the center may be formed to have a lower height H than the body 61 located at the outside. This is to keep the amount of fuel stored in the flow control member 408 by easily overflowing from the upper parts of the main bodies 61 , 62 , 63 , 64 and 65 according to the movement of the vessel.

In addition, when the flow control member 408 is formed by overlapping the plurality of main bodies 61, 62, 63, 64, 65 as in an embodiment of the present invention, each of the main bodies 61, 62, 63, 64, 65), since the space in which the fuel is stored is partitioned, the fuel is distributed and stored in each space. Therefore, even when the fluid located inside the flow control member 408 moves according to the movement of the vessel and applies an impact to the main bodies 61, 62, 63, 64, 65, the plurality of bodies 61, 62 by the amount of the dispersed and stored fuel , 63, 64, 65 by applying an impact, the impact is dispersed, it is possible to prevent damage to the main body (61, 62, 63, 64, 65).

15 is a view for explaining a tank for a ship according to another embodiment of the present invention.

As shown in Figure 15, the tank for a ship according to another embodiment of the present invention is a storage tank (sump structure) formed on the inlet side of the outlet 202 through which fuel is discharged from the tank body 201, that is, the fuel supply pipe 211. (70). The storage tank 70 is located below the tank body 201 , so that it is possible to minimize the movement of fuel in the storage tank 70 even when the vessel moves. And, it is formed to have a wider width than the inlet of the fuel supply pipe 211 so that the fuel supplied from the tank 200 can be stored in a certain amount.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and variations are possible within the scope of the appended claims and the detailed description of the invention and the accompanying drawings. It goes without saying that it falls within the scope of the invention.

41: body 42: support leg
43: first support leg 44: second support leg
45: first body 46: second body
50: cover 51: hinge
53: delay plate 100: ship
200: tank 210: fuel supply pump
400, 401, 402, 403, 404, 405, 406, 407, 408: flow control member

Claims (15)

tank body;
an outlet through which fuel in the tank body is discharged; and
and a flow control member installed to surround the outlet and having a through-portion through which the fuel moves;
The fuel is characterized in that it moves inside and outside of the flow control member through the through portion, a vessel for a tank. The method of claim 1,
The through portion includes a plurality of through holes,
The through hole is characterized in that formed in the lower portion of the flow control member, a tank for a vessel. The method of claim 1,
The flow control member,
main body; and
Including; a plurality of support legs protruding from the lower end of the main body;
The plurality of support legs are arranged at regular intervals along the lower end of the main body, characterized in that the penetrating portion is formed between the plurality of support legs, marine tank. 4. The method of claim 3,
At the lower end of the tank body, further comprising a groove formed along the body of the flow control member,
The plurality of support legs are inserted into the groove, characterized in that coupled to move along the groove, marine tank. 5. The method of claim 4,
The groove includes a first groove and a second groove arranged concentrically,
The plurality of support legs are coupled to the first groove to move a first support leg, and a second support leg coupled to the second groove to move, the vessel tank. 6. The method of claim 5,
While the second supporting leg overlaps the first supporting leg, the size of the penetrating portion is varied according to the distance between the first supporting leg and the second supporting leg, Vessel tank. The method of claim 1,
Further comprising a cover installed on the through portion to open and close the through portion,
The cover is characterized in that it is rotatably coupled with a hinge, marine tank. The method of claim 1,
The flow control member,
a first body having a first width; and
Connected to the lower portion of the first body and characterized in that it comprises a second body having a second width larger than the first body, marine tank. 9. The method of claim 8,
Said penetrating portion, characterized in that located in the second body, tank for ships. The method of claim 1,
The flow control member includes a plurality of bodies having different widths,
Said plurality of main bodies are overlapped to form concentric circles, characterized in that the marine tank. 11. The method of claim 10,
The plurality of main bodies are closer to the center of the flow control member, characterized in that the height is lowered, the tank for ships. 11. The method of claim 10,
Said penetrating portions formed in the plurality of adjacent main bodies, characterized in that the position shifted from each other, marine tanks. The method of claim 1,
One end is fixed to the inner surface of the flow control member, the other end further includes a plurality of delay plates projecting from the inner surface to the opposite inner surface through the center of the flow control member,
The width of the delay plate is characterized in that smaller than the width of the flow control member, a vessel for a tank. 14. The method of claim 13,
The plurality of delay plates are positioned at regular intervals along the height direction of the flow control member,
The adjacent delay plate is characterized in that coupled to the inner surface opposite to each other with respect to the center of the flow control member, marine tank. The method of claim 1,
A tank for ships, characterized in that it further comprises a storage tank formed in the outlet.

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