KR102277373B1 - Tank support structure and ship with the same - Google Patents

Abstract

Tank support structure according to an embodiment of the present invention, a tank provided in the interior of the hull; a protrusion in the form of at least two or more bars protruding from the lower part of the tank toward the hull and extending in different directions; and a support provided at a portion corresponding to the protrusion in the hull and allowing the protrusion to be seated.

Description

Tank support structure and ship with the same}

The present invention relates to a tank support structure and a ship.

In general, a ship includes a propeller connected to the rotation shaft of an engine installed in a hull and a propeller protruding to the outside of the hull, and is operated with propulsion generated by rotating the propeller based on the power of the engine.

Here, various types of ships are manufactured to transport liquid cargo by sea, for example, to move liquid cargo such as LNG (liquefied natural gas), LPG (liquefied petroleum gas), crude oil, etc. The hull is manufactured according to the characteristics of the cargo, and a special type of liquefied gas storage tank is applied to the hull to seal and insulate the cargo at low temperature or high pressure.

In particular, the LPG carrier requires a number of support structures and structural reinforcement in the hull and tank to mount an independent cargo hold. However, the current support structure consists of individual supports to control the load and behavior of components in each direction, such as vertical support, anti-rolling chock, anti-pitching chock, and anti-floating chock, so that a number of reinforcements are made for each. is losing

On the other hand, the anti-floating chock is a device that is provided under the assumption of an accident condition in which flooding occurs rather than under normal operating conditions. The flooding condition is the only one of all load conditions applied to the tank, vertically upward (+ in the z direction). For this reason, in addition to the already reinforced bottom structure and tank lower structure, both the hull and the tank need to be reinforced in the upper part where the anti-floating chock is installed. At this time, the buckling problem may occur when the reinforcement is weak against the compressive stress acting on the tank. However, there is a limit to reducing the weight of the structure, so improvement is required.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to integrate the functions of the support structures having different functions, thereby reducing the amount of reinforcement by simplifying the support structure for supporting the tank. It is to provide a tank support structure and a ship.

Tank support structure according to an embodiment of the present invention, a tank provided in the interior of the hull; a protrusion in the form of at least two or more bars protruding from the lower part of the tank toward the hull and extending in different directions; and a support provided at a portion corresponding to the protrusion in the hull and allowing the protrusion to be seated.

A ship according to another embodiment of the present invention is characterized in that it has the tank support structure.

Specifically, the support may support the protrusion by forming a depression in a tank top that is a horizontal plane facing the lower surface of the tank in the hull.

Specifically, the support may be protruded from a tank top that is a horizontal plane facing the lower surface of the tank in the hull, and a depression may be formed so that the protrusion is inserted.

Specifically, the protrusion may include: a first protrusion extending in a first longitudinal direction corresponding to the centerline BHD; and a second protrusion corresponding to the swash BHD in a second longitudinal direction provided at a right angle to the first longitudinal direction.

Specifically, it may further include a choke portion spaced apart from the protrusion in the interior of the hull to constrain the tank.

Specifically, the choke part may include: a first choke part constraining left and right sides of the tank to prevent rolling of the tank; And it may further include a second choke for restraining the front and rear of the tank to prevent pitching of the tank.

Specifically, an upper unit provided on a circumferential surface of the protrusion to interfere with the protrusion; and a wire connected to the upper unit and the support to prevent floating of the tank.

The tank support structure and the ship according to the present invention can integrate the support structure of an independent tank and the function of the structure for preventing rotational motion (anti-rolling/anti-pitching), so that the structure is simplified, thereby facilitating the manufacture of the ship In addition, it is possible to shorten the drying time and reduce the overall load, thereby increasing the cargo transport volume.

In addition, the present invention utilizes the bottom part of which the anti-floating structure is already reinforced, and changes the compressive load to a tensile load by taking the form of holding the tank receiving buoyancy from the bottom instead of pressing it from above, and stability against buckling. can also be obtained.

1 is a conceptual diagram illustrating a ship according to an embodiment of the present invention.
2 is a perspective view showing a tank support structure according to an embodiment of the present invention.
3 is a front view showing a tank support structure according to an embodiment of the present invention.
Figure 4 is a front view showing another form of the tank support structure according to an embodiment of the present invention.
5 is a side view showing a tank support structure according to an embodiment of the present invention.
6 is a view showing the lower part of the tank for explaining the tank support structure according to another embodiment of the present invention.
7 is a side view showing a tank support structure according to another embodiment of the present invention.
8 is a side view showing another form of a tank support structure according to another embodiment of the present invention.
9 is a view showing the wire operation of the tank support structure according to another embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 are views for explaining a tank support structure of a ship according to an embodiment of the present invention.

1 to 5 , a ship 10 according to an embodiment of the present invention includes a hull 11 and a tank support structure 100 , and the tank support structure 100 includes a tank 110 and A support part 120 may be included.

Here, the vessel 10 may be any type of vessel provided with a liquefied gas storage tank, such as an LNG carrier or a container ship. Hereinafter, the vessel 10 will be described as an LNG carrier as an example.

And an engine room (not shown) may be provided inside the hull 11, and a power device such as an engine for driving a propeller (not shown) may be provided inside the engine room. Here, the power unit may be included in a recipient that consumes fuel, and the recipient is an equipment driven by receiving fuel, and may include a boiler or the like.

An engine (not shown) (an engine for propulsion, an engine for a gas fuel generator, etc.) or a boiler may be driven by being supplied with fuel from a tank, and a supply line (not shown) may be connected to receive fuel, A pump (not shown) or the like may be provided on the supply line. Of course, as the tank 110 to be described below is provided in a configuration in which cargo is stored, and may be distinguished from a tank that supplies fuel to the engine, modifications thereof are various.

In addition, in the present specification, liquefied gas, which is a fuel supplied or stored in an engine or tank, may be used to encompass all gas fuels generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, etc., which are evaporated Gas can be applied as well. In addition, the boil-off gas may be used to mean not only gaseous boil-off gas but also liquefied boil-off gas.

The tank 110 may be formed of an independent tank provided in the interior of the hull 11 . Here, the tank 110 may be classified into an independent type and a membrane type depending on whether the load of the cargo is directly applied to the insulation material, and in particular, the independent storage tank is divided into a MOSS type and an SPB type. The tank 110 of this embodiment may be formed of an SPB type among independent tanks.

The support part 120 is provided on the hull 11 and may support the tank 110 . That is, the tank 110 made of a standalone structure requires a support structure to be supported so that it can be placed on the bottom of the hull 11 , and the support unit 120 may be provided as a means for supporting the tank 110 .

In particular, the support part 120 of this embodiment is made simple compared to the conventional complex structure, so that assembly is facilitated, and thus manpower can be reduced. Unlike the prior art, which required a plurality of support structures having different functions, the function By forming this integrated support 120, it is possible to reduce the amount of reinforcement.

In addition, the support 120 may be provided on the upper portion of the tank 110 as well as the lower portion of the tank 110 to connect the tank 110 and the hull 11 , such a support 120 is the load of the tank 110 . It is possible to prevent floating while supporting, as well as prevent rolling and pitching when the support part 120 is provided at the upper and lower parts of the tank 110 .

Specifically, the support 120 may include a first protrusion 121 , a second protrusion 122 and a pin member 123 , and depending on the function, the arrangement relationship of the support part 120 is in the longitudinal direction of the ship or It can be installed in the width direction.

In addition, the support 120 may be provided on the upper surface of the tank 110 , but below, for the sake of understanding and convenience of description, the support 120 will be described as an example provided in the lower part of the tank 110 . Therefore, the vertical position to be described below may be changed according to the arrangement relationship of the configuration provided in the tank 110 and the hull 11, of course.

First, the first protrusion 121 may protrude from the tank 110 toward the hull 11 , and the second protrusion 122 may protrude from the hull 11 toward the tank 110 , and the first protrusion It may be provided in parallel with the 121, the first protrusion 121 and the second protrusion 122 may form a shape symmetrical with each other.

For example, the first protrusion 121 has a plate shape that decreases in width from the top to the bottom, and the second protrusion 122 has a plate shape that decreases from the bottom to the top, so that the first protrusion 121 has a plate shape. ) and the point at which each of the second protrusions 122 are connected to each other may form an expanded form in comparison with a region where the first protrusion 121 and the second protrusion 122 face each other.

Here, referring to FIGS. 2 and 5 , each of the first protrusion 121 and the second protrusion 122 may have a constant thickness, and any one of the first protrusion 121 and the second protrusion 122 may It may be provided in pairs, and the other one may be inserted between the structures provided in pairs.

At this time, a portion of the first protrusion 121 and the second protrusion 122 is provided to interfere with each other, and a through hole 1221 for coupling the pin member 123 is formed in the interfering region, thereby forming the first protrusion ( 121 and the second protrusion 122 may be coupled by being constrained by the pin member 123 .

That is, the pin member 123 is connected through the first protrusion 121 and the second protrusion 122 , respectively, so that the first protrusion 121 is constrained to the second protrusion 122 , and the second protrusion 122 . By being constrained to the first protrusion 121, the tank 110 connected to the first protrusion 121 may form an anti-floating system.

Here, since the anti-floating system to prevent the floating of the tank is to utilize the lower part of the tank 110 of a strong structure and the bottom of the hull 11, the hull 11 for installing the conventional anti-floating chock And because there is no need to achieve additional reinforcement of the upper tank 110, the reinforcement structure of the vessel 10 can be simplified, it is possible to increase the cargo load by reducing the load of the vessel 10 due to the reinforcement structure, of course, Work to achieve structural reinforcement is not required and manpower can be reduced.

In addition, the pin member 123 is an example of a material with low thermal conductivity. A steel bar is provided in the center, and a material such as rubber, silicon, wood, etc. is coated or covered on the circumferential surface of the steel bar, or is simply made of wood. Heat conduction between the first protrusion 121 and the second protrusion 122 to which the member 123 directly contacts may be low.

In addition, the area of the first protrusion 121 and the second protrusion 122 to which the pin member 123 is in contact is limited to a region corresponding to the inner circumferential surface of the through hole 1221 among the circumferential surfaces of the pin member 123 . Since the heat conduction can be minimized, the thermal insulation efficiency between the tank 110 and the hull 11 can be improved.

Of course, a well-known separate insulating material (not shown) may be provided at the lower portion of the tank 110 to form an insulating structure.

Such a fin member 123 not only minimizes heat transfer between the hull 11 and the tank 110, but also provides a gap in the diameter of the fin member 123 and the diameter of the through hole 1221 so that the behavior other than the submerged situation is You can also make it unrestricted.

For example, the pin member 123 may have a variety of modifications, such as a rod or a wide bar (corners may be rounded), which may be formed in a circular or elliptical cross-section in a specific direction according to the design of the support structure of the tank 110 . It is also possible to respond to the deformation of the tank 110 due to thermal contraction or the like by releasing the degree of freedom.

Here, the support part 120 may be provided in plurality, for example, in a structure in which the tank 110 is supported by the hull 11 by the support part 120 provided in plurality along the longitudinal direction of the tank 110 . Provided, but the support 120 allows the movement of the tank 110 according to the shaking of the hull 11, one end may form a fixed form.

To this end, the support part 120 is made of a fixed type of any one of the plurality of support parts 120, and the rest are provided to be movable based on a fixed point, and depending on whether the cryogenic fuel is filled/discharged, the tank ( Even when 110 is contracted/expanded, the pin member 123 is slidable by the movable support unit 120 , that is, within the through hole 1221 , so that the pin member 123 moves in conjunction with the contraction/expansion of the tank 110 . By doing so, it is possible to prevent the connection portion between the support 120 and the tank 110 from being damaged.

That is, the pin member 123 may be of a simple rotation type or a sliding type according to the design of the degree of freedom of the tank 110 , and the pin member 123 of the simple rotation type is mounted on the circumferential surface of the through hole 1221 . However, it may be provided to achieve idle rotation in a state in which sliding is prevented. And the sliding pin member 123 may be provided to be movable in the width direction of the pin member 123 within the through hole 1221, in this case, the diameter of the through hole 1221 is the width of the pin member 123 beam. It is possible to allow sliding of the pin member 123 by forming a shape extending in the direction.

In addition, the pin member 123 can be formed in various modifications such as a circular, oval, and polyhedral cut surface regardless of a simple rotation type or a sliding type, and the simple rotation type and the sliding type of the pin member 123 are mutually exclusive. Various modifications are possible, as can be achieved in combination.

And Figures 6 to 8 are views for explaining the tank support structure according to another embodiment of the present invention, Figure 9 is a view showing the operation of the wire installed in the tank support structure of the present invention.

6 to 9 , the ship 10 may include a tank 110 and a tank support structure 200 , and the tank support structure 200 includes a protrusion 220 , a support 230 , and a choke. It may include the part 15, and various modifications are possible as the tank support structure 200 of this embodiment may be provided separately or together with the support part 120 described above.

Here, when the tank support structure 200 of this embodiment is combined with the tank support structure 100 of an embodiment, the support part 120 of the embodiment is replaced with the choke part 15 of this embodiment, or the support part 200 ) and the choke unit 15 may be alternately disposed with each other, various modifications may be possible by combining known configurations and mechanisms as well as the embodiments of the present invention.

The protrusion 220 of the tank support structure 200 is configured to support the tank 110 in a vertical direction, and at least two bars protruding from the lower portion of the tank 110 toward the hull 11 and extending in different directions. (bar), and may be made of wood as an example of a material with low thermal conductivity.

For example, the protrusion 220 may include a first protrusion 221 and a second protrusion 222 , wherein the first protrusion 221 extends in the first longitudinal direction to correspond to a centerline bulkhead (BHD). The second protrusion 222 may correspond to the swash BHD in the second longitudinal direction provided at a right angle to the first longitudinal direction.

Here, the protrusion 220 may be formed in a continuous cross shape by the first protrusion 221 and the second protrusion 222 to facilitate structural reinforcement, and a structure in which the bulkhead supports its own weight and cargo load. The additional reinforcement structure can be minimized or omitted.

In addition, the continuous structure of the first protrusion 221 and the second protrusion 222 is, in view of the fact that the ship 10 is a large structure, a plurality of wooden blocks simply abut against each other or bolt / for ease of manufacture. It may be formed in a form connected by an adhesive or the like, but the manufacturing method is not limited thereto.

In addition, the protrusion 220 formed in a cross shape in the lower portion of the tank 110 is constrained by the support 230 , for example, a rolling choke and a rolling choke by each of the first protrusion 221 and the second protrusion 222 . Since the pitching choke function may be achieved, the above-described support part 120 or choke part 15 is disposed in a space where the protrusion part 220 is not provided in the lower part of the tank 110 by minimizing the reinforcement range by the protrusion part 220 . can be

In particular, since the flooding condition has to withstand only the hydrostatic pressure of the draught level, the installation of the choke unit 15 may be made using only the space under the tank 110 remaining after the protrusion 220/support 230 is installed.

In addition, the protrusions 220 may be complemented with each other by the chokes 15 , so that there is no need to provide the chokes 15 on the lower front surface of the tank 110 , and adjacent to each corner and the outside of the tank 110 . By limiting the area, it is possible to minimize the structure between the tank 110 and the hull 11 to simplify the overall load and structure of the vessel 10 .

In addition, the protrusion 220 may be constrained by the support 230 in a form that is simply disposed on the lower surface of the tank 110 , and on the circumferential surface of the protrusion 220 so that the tank 110 is interlocked with the protrusion 220 . A separate upper unit 2201 may be provided.

Here, the upper unit 2201 is configured to constrain the protrusion 220 to the tank 110 , and the upper unit 2201 may be provided on a circumferential surface of the protrusion 220 . For example, the upper unit 2201 and the protrusion 220 may be coupled by a bolt, but preferably, the upper unit 2201 is connected to the tank 110, and the upper unit 2201 is the protrusion 220 Since it is not connected to, the tank 110 can be made to float regardless of the protrusion 220 when submerged. Accordingly, the number of work required to couple the upper unit 2201 and the protrusion 220 can be reduced.

However, the aforementioned support 120 is provided for anti-floating of the tank 110 so that the tank 110 does not collide with the inner upper surface of the hull 11 when the tank 110 is floating due to flooding. can be prevented.

Alternatively, a fastening groove (not shown) for fastening the wire 2202 to each of the upper unit 2201 and the support 230 is provided, and the wire 2202 is connected to the fastening groove to prevent the tank 110 from floating. The floating height of the tank 110 may be limited through the bendable wire 2202 . Here, the wire 2202 may be made of a rope made of carbon fiber, as an example of a material having a strong tensile force and low thermal conductivity.

The support 230 is provided at a portion corresponding to the protrusion 220 in the hull 11 and allows the protrusion 220 to be seated, thereby constraining the protrusion 220 .

For example, as shown in FIG. 7 , the support 230 is formed with a depression 231 in the tank top, which is a horizontal plane facing the lower surface of the tank 110 in the hull 11, so that the protrusion ( 220), it is possible to achieve a structure provided concave in the shape of a cross on the tank top.

On the other hand, as shown in FIG. 8 , the support 230 may be formed without changing the structure of the tank top, and the support 230 is separately from the tank top, which is a horizontal plane facing the lower surface of the tank 110 in the hull 11 . It may have a protruding structure, and a depression 231 may be formed in the support 230 so that the protrusion 220 is inserted.

That is, the support 230 may be made through various modifications in which a depression 231 that interferes with at least a portion of the protrusion 220 is formed for restraint of the protrusion 220 , and corresponds to the horizontal cut surface of the protrusion 220 . It can be made of a groove structure. The support 230 is provided to prevent the movement of the protrusion 220, and the material is not limited and may be made of a material constituting a general tank top.

The choke part 15 may be spaced apart from the protrusion 220 in the interior of the hull 11 to constrain the tank 110 . For example, the choke unit 15 may be structured with each other for preventing rolling and preventing pitching, and a known mechanism may be applied to the choke unit 15 , and as mentioned above, the support unit 120 . may be replaced with

In this way, in this embodiment, the support structure of the tank 110 is simplified, so that the ship 10 can be easily manufactured, the number of work hours can be reduced, and the total load of the ship 10 can be reduced.

It goes without saying that the present invention is not limited to the embodiments described above, and a combination of the above embodiments or a combination of at least one of the embodiments and a known technology may be included as another embodiment.

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention. It will be clear that the transformation or improvement is possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

100: ship 101: hull
110: tank 120: support
121: first protrusion 122: second protrusion
1221: through hole 123: pin member
220: protrusion 2201: upper unit
2202: wire 221: first protrusion
222: second protrusion 230: support
231: recessed part 240: choke part

Claims (8)

a tank provided on the inside of the hull;
a protrusion in the form of at least two or more bars protruding from the lower part of the tank toward the hull and extending in different directions; and
It is provided in a portion corresponding to the protrusion in the hull and includes a support for allowing the protrusion to be seated,
The protrusion is
a first protrusion extending in a first longitudinal direction corresponding to the centerline bulkhead; and
and a second protrusion corresponding to the swash bulkhead corresponding to a second longitudinal direction provided at a right angle to the first longitudinal direction,
The protrusion is
Tank support structure, characterized in that made of a continuous cross shape by the first and the second protrusion. According to claim 1, wherein the support,
Tank support structure, characterized in that the depression is formed in a tank top (tank top) that is a horizontal surface facing the lower surface of the tank in the hull to support the protrusion. According to claim 1, wherein the support,
A tank support structure, characterized in that the hull is protruded from a tank top that is a horizontal surface facing the lower surface of the tank, and a depression is formed so that the protrusion is inserted. delete According to claim 1,
The tank support structure further comprising a choke portion spaced apart from the protrusion in the interior of the hull to constrain the tank. The method of claim 5, wherein the choke part,
a first choke portion constraining left and right sides of the tank to prevent rolling of the tank; and
Tank support structure, characterized in that it further comprises a second choke for restraining the front and rear of the tank to prevent pitching of the tank. According to claim 1,
an upper unit provided on a circumferential surface of the protrusion and interfering with the protrusion; and
The tank support structure further comprising a wire connected to the upper unit and the support to prevent the tank from floating. A ship, characterized in that it has the tank support structure of any one of claims 1 to 3, and claims 5 to 7.

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