JP2024500741A - Liquefied gas storage tanks and ships containing them - Google Patents

Abstract

A liquefied gas storage tank according to an embodiment of the present invention includes a tank body member in which liquefied gas is stored, and an inner member provided inside the tank body member, which replaces a water removal partition and guides the flow of the liquefied gas. Can include a frame unit.

Description

The present invention relates to a liquefied gas storage tank and a ship including the same.

Petroleum resources, which are generally used as transportation fuel for automobiles and ships, and various fuels used domestically and internationally, are gradually being depleted, and liquefied gas is being used as an alternative energy source in response to rising oil prices and stricter environmental regulations. usage is increasing.

For example, the liquefied gas includes liquefied natural gas (LNG), liquefied propane gas (LPG), and the like. The volume of such liquefied gas decreases to a greater extent than in the gaseous state (for example, in the case of LNG, the volume decreases to 1/600 when liquefied, and in the case of LPG, the volume decreases to 1/250 when liquefied. ) It is convenient to store and transport in the liquefied state, but there is a difficulty in maintaining the temperature below the boiling point (approximately -162°C for LNG and -50°C for LPG) .

In order to store such liquefied gas, a cryogenic liquefied gas storage tank that maintains the liquefied gas below its boiling point is required.

By the way, the liquefied gas storage tank is a structure that stores liquefied fuel for transportation vehicles such as ships, and because liquid is stored inside, it is necessarily a floating structure such as a ship or a land transportation vehicle. This movement prevents the liquefied gas storage tank from always remaining horizontal with respect to the water surface or ground, which causes a flow of liquid fuel.

This flow of liquefied gas causes collision of the flowing liquefied gas with the inner wall of the liquefied gas storage tank, and such continuous collisions have the problem of causing damage to the liquefied gas storage tank. .

Therefore, conventionally, a swash bulk head wall was provided inside the liquefied gas storage tank to prevent damage to the liquefied gas storage tank due to the swaying of the liquefied gas.

However, such a water removal partition is provided in the form of a partition wall in the middle of the liquefied gas storage tank, and as a heavy member, it is difficult to construct it inside the liquefied gas storage tank and has the problem of increasing manufacturing costs. .

Therefore, in order to solve or improve the above-mentioned problems, research into liquefied gas storage tanks and ships containing the same has become necessary.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquefied gas storage tank and a ship including the same, which prevent the problem of collision between the flowing liquefied gas and the inner wall of the liquefied gas storage tank due to the generation of flowing liquefied gas.

In another aspect, the present invention prevents the problem of collision of the flowing liquefied gas with the inner wall of the liquefied gas storage tank due to the generation of flowing liquefied gas without using a conventional water removal partition; An object of the present invention is to provide a liquefied gas storage tank that can support the liquefied gas storage tank and a ship including the same.

A liquefied gas storage tank according to an embodiment of the present invention includes a tank body member in which liquefied gas is stored, and is provided inside the tank body member to replace a water removal partition and guide the flow of the liquefied gas. It can include an inner frame unit.

Specifically, the inner frame unit of the liquefied gas storage tank according to an embodiment of the present invention is coupled to a ring support member and the ring support member that are continuously provided in the inner circumferential direction of the tank body member, The split guiding member may be provided in a shape including a curved surface and guide the liquid gas to return to the flow inflow direction along the curved surface portion.

Here, the split guide member of the liquefied gas storage tank according to an embodiment of the present invention has one end coupled to the ring support member and is bent toward the short side wall of the tank body member. The other end can be provided with a.

The liquefied gas storage tank according to an embodiment of the present invention has a plurality of split guide members extending along the inner circumferential direction of the tank body member, and the direction of curved surface formation is different from that of the other split guide members adjacent to each other. The curved surface may be formed in a direction opposite to the direction of the curved surface formation.

Alternatively, in the liquefied gas storage tank according to an embodiment of the present invention, a plurality of divided guide members are provided along the inner circumferential direction of the tank body member, and the direction of curved surface formation is that of the adjacent divided guide members. It can be formed in the same direction as the curved surface formation direction.

Here, the ring support member of the liquefied gas storage tank according to an embodiment of the present invention may have a T-shaped cross section.

The liquefied gas storage tank according to an embodiment of the present invention also includes an inflow pipe section that connects the inside and outside of the tank body member, and the liquefied gas is stored inside the tank body member via the inflow pipe section. The inner frame unit further includes a pump unit that sucks the liquefied gas and transmits it to the outside, and the inner frame unit is arranged at the bottom of the tank body member, and the inner frame unit is arranged such that an end of the inflow pipe part is immersed in the liquefied gas. The present invention may include a residual water accommodating member having a recess formed therein for accommodating the liquefied gas, and an upper end guiding member coupled to an upper end of the residual water accommodating member.

Here, the upper end guiding member of the liquefied gas storage tank according to an embodiment of the present invention is provided with a curved surface, and guides the liquefied gas so that it passes along the curved surface portion and returns to the flow inflow direction. be able to.

Further, the residual water storage member of the liquefied gas storage tank according to an embodiment of the present invention may have a residual water flow hole formed at an upper end thereof through which the liquefied gas moves.

Further, the inner frame unit of the liquefied gas storage tank according to an embodiment of the present invention includes a bottom support member that is provided at least at the bottom of the tank body member and has a T-shaped cross section; one end of the member is coupled to a horizontal portion of the upper end of the member, one end is coupled to one end of the horizontal portion of the bottom support member, the other end is coupled to the bottom of the tank body member, and the liquefied gas is coupled to the bottom support member. A tilted guiding member may be included to guide movement along the member.

A ship according to another embodiment of the present invention may include a ship body including the liquefied gas storage tank and an engine unit provided with the liquefied gas storage tank and providing driving force.

The liquefied gas storage tank of the present invention and the ship including the same have the advantage of being able to prevent the problem of collision between the internal wall of the liquefied gas storage tank and the flowing liquefied gas due to the generation of flowing liquefied gas.

In another aspect, the liquefied gas storage tank of the present invention and the ship including the same can be provided by generating a flow of liquefied gas and causing the liquefied gas to flow with the inner wall of the liquefied gas storage tank without using a conventional water removal bulkhead. This has the advantage of preventing collision problems and supporting the liquefied gas storage tank.

As a result, it is possible to easily manufacture the liquefied gas storage tank, reduce manufacturing costs, and prevent damage to the liquefied gas storage tank.

However, the various yet significant advantages and effects of the present invention are not limited to the above-mentioned contents, and can be more easily understood through the description of specific embodiments of the present invention.

FIG. 2 is a side view showing an embodiment of the liquefied gas storage tank of the present invention, which includes a ring support member and a division guide member, and in which the curved surfaces of adjacent division guide members are formed in different directions. FIG. 2 is a perspective view showing the ring support member and the division guide member of FIG. 1, showing an embodiment in which the directions of curved surfaces of adjacent division guide members are formed in different directions. FIG. 2 is a side view showing an embodiment of the liquefied gas storage tank of the present invention, which includes a ring support member and a division guide member, and in which the curved surfaces of adjacent division guide members are formed in the same direction. FIG. 4 is a perspective view illustrating the ring support member and the division guide member of FIG. 3, showing an embodiment in which the curved surfaces of adjacent division guide members are formed in the same direction. FIG. 2 is a front view showing an embodiment of the liquefied gas storage tank of the present invention including a residual water storage member and an upper end guiding member. FIG. 2 is a front view showing an embodiment of the liquefied gas storage tank of the present invention including a bottom support member and a tilt guiding member. 1 is a side view showing a liquefied gas storage tank of the present invention and a ship including the same.

In the following, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into several other forms, and the scope of the present invention is not limited to the embodiments described below. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Therefore, the shapes and sizes of elements in the drawings may be displayed enlarged or reduced (or highlighted or simplified) for clearer explanation.

Further, in this specification, a singular expression includes a plural expression unless it has a clearly different meaning from the context, and the same reference numerals or reference numerals given in a similar manner throughout the specification refer to the same component or The corresponding components shall be indicated.

The present invention relates to a liquefied gas storage tank 1 and a ship including the same, and an inner frame unit 20 that replaces a water removal bulkhead (swash bulk head wall) is provided inside a tank body member 10. Since the frame unit 20 guides the flow of the liquefied gas, it is possible to prevent the problem of collision between the flowing liquefied gas and the inner wall of the liquefied gas storage tank 1 due to the flow of the liquefied gas.

In another aspect, the liquefied gas storage tank 1 of the present invention and the ship including the same can be provided with the inner frame unit 20 so that the liquefied gas storage tank 1 can generate a flow of liquefied gas without using a conventional water removal bulkhead. The problem of collision of the flowing liquefied gas with the inner wall of the tank 1 can be prevented, and the liquefied gas storage tank 1 can be supported.

This makes it possible to easily manufacture the liquefied gas storage tank 1 and prevent damage to the liquefied gas storage tank 1 while reducing manufacturing costs.

Specifically, the liquefied gas storage tank 1 of the present invention can include a tank body member 10 and an inner frame unit 20.

1 and 3 are side views showing an embodiment of the liquefied gas storage tank 1 of the present invention including a ring support member 21 and a split guide member 22, and FIG. 1 shows a curved surface of the split guide member 22. This shows an embodiment in which the curved surface is formed in the opposite direction to that of the other adjacent division guide members 22, and FIG. 3 shows an embodiment in which the curved surface is formed in the same direction.

2 and 4 are perspective views showing the ring support member and the division guide member of FIG. 1 or 3, respectively.

The tank body member 10 of the liquefied gas storage tank 1 according to an embodiment of the present invention can store liquefied gas.

The inner frame unit 20 of the liquefied gas storage tank 1 according to an embodiment of the present invention is provided inside the tank body member 10, and can replace the water removal partition and guide the flow of the liquefied gas. .

That is, the inner frame unit 20 is provided inside the tank body member 10 in place of the conventional water removal partition, and serves to guide the flow of liquefied gas.

This can improve the problem of the liquefied gas applying impact to one side of the interior of the tank body member 10, and since it does not include a heavy water removal partition, the liquefied gas storage tank 1 can be easily manufactured. It can save costs.

Specifically, the inner frame unit 20 may include a ring support member 21 and a division guiding member 22, as one example.

Here, the ring support member 21 may be continuously provided in the inner circumferential direction of the tank body member 10. The split guide member 22 is coupled to the ring support member 21 and has a curved surface, so that the liquefied gas can be guided back to the flow inflow direction D along the curved surface.

That is, the ring support member 21 plays a role of supporting the tank body member 10, and thereby, it is possible to support the tank body member 10 even if the conventional water removal partition is removed and replaced with the inner frame unit 20 of the present invention. become able to. Such a support function of the ring support member 21 can be further strengthened by providing the ring support member 21 in a continuous ring shape in the inner circumferential direction of the tank body member 10.

Such a ring support member 21 can further increase its supporting force by limiting the shape of its cross section. That is, the ring support member 21 of the liquefied gas storage tank 1 according to an embodiment of the present invention may have a T-shaped cross section.

The split guide member 22 of the present invention serves to improve the problem of liquefied gas suddenly moving from one side of the tank body member 10 to the other side and applying an impact to the tank body member 10. To this end, the division guiding member 22 is formed to include a curved surface, thereby guiding the liquefied gas to flow along the curved surface portion of the division guiding member 22. Further, thereby, the liquefied gas is guided back to the flow inflow direction D transmitted to the split guide member 22.

Therefore, the problem of the liquefied gas suddenly shifting from one side of the tank body member 10 to the other side can be improved, and the problem of the liquefied gas applying impact to the tank body member 10 can be improved.

Specifically, the division guide member 22 of the liquefied gas storage tank 1 according to an embodiment of the present invention has one end coupled to the ring support member 21 and extends toward the short side wall portion 10b of the tank body member 10. The other end may be provided in a bent form. Here, the short side wall portion 10b means a side wall portion of the tank body member 10 that is relatively short in length when viewed from the top of the tank body member 10. Further, the long side wall portion 10c refers to a side wall portion of the tank body member 10 that is relatively long when viewed from the top of the tank body member 10.

That is, the split guide member 22 may be formed in a form bent toward either of the short side wall portions 10b on both sides of the tank body member 10. As a result, when a flow occurs in which the liquefied gas stored in the short side wall portion 10b on one side suddenly moves toward the short side wall portion 10b on the other side, the liquefied gas is transmitted along the curved surface of the split guiding member 22. and is returned to its original position in the direction of one short side wall portion 10b. This can prevent the problem of the liquefied gas applying an impact to the other short side wall portion 10b.

Further, as an example, the division guiding member 22 may be formed with a curved surface bent in a direction opposite to that of other adjacent division guiding members 22.

That is, a plurality of division guide members 22 of the liquefied gas storage tank 1 according to an embodiment of the present invention are provided along the inner circumferential direction of the tank body member 10, and the curved surface formation direction is adjacent to other division guide members. The curved surface may be formed in a direction opposite to that of curved surface 22.

According to this, it is possible to prevent the impact problem caused by the liquefied gas suddenly transmitted from either side of the split guiding member 22.

As an example, some of the division guide members 22 form a curved surface toward the short side wall portion 10b on one side, and the remaining portion of the division guide members 22 adjacent thereto form a curved surface toward the short side wall portion 10b on the other side. It is possible to form a curved surface. According to this, some of the split guide members 22 guide a part of the liquefied gas that is suddenly transmitted from the one short side wall portion 10b back to the one short side wall portion 10b, and The remaining part of the adjacent divided guide members 22 can guide a part of the liquefied gas suddenly transmitted from the other short side wall 10b back to the other short side wall 10b. .

Alternatively, for example, the plurality of split guiding members 22 may all be formed in a curved shape bent in the same direction.

That is, a plurality of division guide members 22 of the liquefied gas storage tank 1 according to an embodiment of the present invention are provided along the inner circumferential direction of the tank body member 10, and the curved surface formation direction is adjacent to other division guide members. The curved surface may be formed in the same direction as the curved surface of No. 22.

According to this, it is possible to prevent the impact problem caused by the liquefied gas suddenly transmitted from one side by the split guiding member 22.

As an example, when the plurality of division guide members 22 form a curved surface toward the one short side wall 10b, the liquefied gas suddenly transmitted from the one short side wall 10b is transferred to the one short side wall 10b. can be induced to return again.

This embodiment of the division guide member 22 is different from the embodiment of the division guide member 22 formed to bend in the opposite direction to the other adjacent division guide members 22 described above. A larger flow rate of the liquefied gas transmitted from the side wall portion 10b can be induced to return.

FIG. 5 is a front view showing an embodiment of the liquefied gas storage tank 1 of the present invention including the residual water storage member 23 and the upper end guide member 24. Referring to FIG. 5, the liquefied gas storage tank 1 of the present invention may further include a pump unit 30. Further, the inner frame unit 20 of the present invention may include a residual water storage member 23 and an upper end guide member 24.

Here, the pump unit 30 of the liquefied gas storage tank 1 according to an embodiment of the present invention may include an inflow pipe part 31 that connects the inside and the outside of the tank body member 10. The pump unit 30 can suck the liquefied gas stored inside the tank body member 10 through the inflow pipe part 31 and transmit it to the outside.

The residual water storage member 23 of the present invention is disposed at the bottom 10a of the tank body member 10, and a recess 23a for storing the liquefied gas is formed so that the end of the inflow pipe portion 31 is immersed in the liquefied gas. be able to.

Further, the upper end guide member 24 of the present invention may be coupled to the upper end portion of the residual water storage member 23. Further, the upper end guide member 24 of the present invention has a curved surface, and can guide the liquefied gas so that it returns to the flow inflow direction D along the curved surface.

A part of the liquefied gas stored in the tank body member 10 is transmitted to the outside through the inflow pipe part 31 of the pump unit 30, and the remaining liquefied gas remains at the bottom 10a of the tank body member 10. Furthermore, since the residual liquefied gas converges in the recess 23a of the residual water storage member 23, which is located lower than the bottom 10a of the tank body member 10, the end of the inflow pipe portion 31 is liquefied even if there is little residual liquefied gas. Becomes immersed in gas.

In order for the liquefied gas to converge in the recess 23a of the residual water storage member 23, residual water flow holes 23b may be formed in the residual water storage member 23.

That is, the residual water storage member 23 of the liquefied gas storage tank 1 according to an embodiment of the present invention may have a residual water flow hole 23b formed at an upper end thereof through which the liquefied gas moves.

Thereby, the liquefied gas located adjacent to the bottom 10a of the tank body member 10 can move to the recess 23a of the residual water storage member 23 via the residual water flow hole 23b.

The upper end guiding member 24 of the present invention serves to return liquefied gas that suddenly flows due to the tilting of a transportation vehicle such as a ship to its original position.

Specifically, the upper end guiding member 24 of the present invention may include a curved surface portion having a bent shape. When the liquefied gas suddenly flows and is transmitted to the curved surface portion of the upper end guide member 24, the liquefied gas moves along the curved surface portion of the upper end guide member 24.

Therefore, the flow of the liquefied gas is guided in the direction toward which the curved portion of the upper end guide member 24 faces. For example, the curved surface portion of the upper end guide member 24 may be bent toward either of the short side wall portions 10b on both sides, so that the curved portion of the upper end guiding member 24 may be bent toward either of the short side wall portions 10b on both sides. When a flow occurs in which the liquefied gas suddenly moves in the direction of the short side wall portion 10b on the other side, the liquefied gas flows along the curved surface of the upper end guiding member 24 and returns to its original position on the short side wall portion 10b on one side. It is returned in the direction of section 10b. This can prevent the problem of the liquefied gas applying an impact to the other short side wall portion 10b.

FIG. 6 is a front view showing an embodiment of the liquefied gas storage tank 1 of the present invention including the bottom support member 26 and the tilt guiding member 25. Referring to FIG. 6, the inner frame unit 20 of the liquefied gas storage tank 1 of the present invention may include a bottom support member 26 and a tilt guide member 25.

Here, the bottom support member 26 is provided at least on the bottom portion 10a of the tank body member 10, and may have a T-shaped cross section. The tilt guiding member 25 is coupled to the upper horizontal portion of the bottom support member 26, one end thereof is coupled to one side end of the horizontal portion of the bottom support member 26, and the other end is coupled to the bottom portion 10a of the tank body member 10. liquefied gas can be guided to move along the bottom support member 26.

In other words, the bottom support member 26 plays a role of supporting the tank body member 10, and thereby the tank body member 10 can be supported even if the conventional water removal partition is removed and replaced with the inner frame unit 20 of the present invention. can. The bottom support member 26 may be provided only on the bottom portion 10a of the tank body member 10, or may be provided in the form of a continuous ring in the inner circumferential direction of the tank body member 10.

The bottom support member 26 may have a T-shaped cross section to further increase its supporting force.

Then, when the liquefied gas on one side of the tank body member 10 suddenly flows toward the other side of the tank body member 10, the liquefied gas flows to the bottom because the flow path is blocked by the bottom support member 26. After being aggregated around the support member 26, the aggregated and increased flow rate overcomes the bottom support member 26 and suddenly moves to the other side of the tank body member 10, causing an even larger impact on the other side of the tank body member 10. Adding side issues can be improved.

That is, even if a small amount of liquefied gas remains inside the tank body member 10, the liquefied gas will be located at least at the bottom 10a of the tank body member 10, but the liquefied gas located at the bottom 10a at this time will be destroyed when it suddenly flows. The problem of applying an amplified impact to the tank body member 10 due to the agglomeration of liquefied gas can be improved by the tilt guiding member 25.

In other words, the tilt guide member 25 tilts the horizontal portion of the upper end of the bottom support member 26 and the bottom portion 10a of the tank body member 10 so that the flowing liquefied gas does not aggregate on the “T” portion of the bottom support member 26. It is connected by form. As a result, the liquefied gas can move from one side of the tank body member 10 to the other side along the inclined guide member 25, so that the problem of agglomeration around the bottom support member 26 can be prevented.

On the other hand, such an inclination guide member 25 is located only around the bottom 10a of the tank body member 10, and is not located around the side wall portions such as the long side wall portions 10c of the tank body member 10. This is because if the liquefied gas is stored up to the periphery of the long side wall portion 10c, there is no need to consider agglomeration of the liquefied gas, and the flow rate of the liquefied gas is relatively large. That is, if the liquefied gas is stored up to the periphery of the long side wall portion 10c of the tank body member 10, it is only necessary to prevent the flow of the liquefied gas so as to prevent the impact caused by the sudden flow of the liquefied gas. Therefore, agglomeration is not a consideration.

FIG. 7 is a side view showing the liquefied gas storage tank 1 of the present invention and a ship including the same. Referring to FIG. 7, the ship of the present invention may include a liquefied gas storage tank 1 and a hull 2.

Here, the description of the liquefied gas storage tank 1 is replaced with the description of the liquefied gas storage tank 1 mentioned above.

The hull 2 is provided with the liquefied gas storage tank 1 and may include an engine section 2a that provides driving force.

That is, since the ship of the present invention includes the liquefied gas storage tank 1 described above, the sudden flow of liquefied gas can cause the internal wall of the liquefied gas storage tank 1 and the flow to occur without using the conventional water removal bulkhead. The problem of collision of liquefied gas can be prevented.

As described above, the ship of the present invention makes it possible to easily manufacture the liquefied gas storage tank 1 without using a conventional water removal bulkhead, and to prevent damage to the liquefied gas storage tank 1 while reducing manufacturing costs. I can do it.

Furthermore, since the liquefied gas storage tank 1 can be made lighter, the operating efficiency of the ship can be improved.

Although the embodiments of the present invention have been described in detail above, the scope of rights of the present invention is not limited thereto, and various modifications and changes may be made without departing from the technical idea of the present invention as described in the claims. It will be apparent to those of ordinary skill in the art that variations are possible.

1 Liquefied gas storage tank 2 Hull 10 Tank body member 20 Inner frame unit 21 Ring support member 22 Division guide member 23 Remaining water storage member 24 Upper end guide member 25 Incline guide member 26 Bottom support member 30 Pump unit 31 Inflow pipe section

Claims (11)

A liquefied gas storage tank, comprising: a tank body member in which liquefied gas is stored; and an inner frame unit that is provided inside the tank body member, replaces a water removal partition, and guides the flow of the liquefied gas. The inner frame unit is
a ring support member provided continuously in the inner circumferential direction of the tank body member; and a ring support member coupled to the ring support member and provided in a form including a curved surface so that the liquefied gas returns to the flow inflow direction along the curved surface portion. The liquefied gas storage tank according to claim 1, further comprising: a divided guiding member for guiding the liquefied gas storage tank. The liquefier according to claim 2, wherein the division guide member has one end coupled to the ring support member and the other end bent toward the short side wall of the tank body member. gas storage tank. A plurality of said division guide members are provided along the inner circumferential direction of said tank body member, and the direction of curved surface formation is opposite to the direction of curved surface formation of other adjacent division guide members. The liquefied gas storage tank described in . A plurality of the division guide members are provided along the inner circumferential direction of the tank body member, and the curved surface is formed in the same direction as the curved surface of another adjacent division guide member. The liquefied gas storage tank described in . The liquefied gas storage tank according to claim 2, wherein the ring support member has a T-shaped cross section. a pump unit comprising an inflow pipe section connecting the inside and outside of the tank body member, and sucking the liquefied gas stored inside the tank body member through the inflow pipe section and transmitting it to the outside; In addition, it includes
The inner frame unit is
a residual water storage member that is disposed at the bottom of the tank body member and has a recess that accommodates the liquefied gas so that the end of the inflow pipe portion is immersed in the liquefied gas; and the residual water storage member. The liquefied gas storage tank of claim 1, comprising: an upper end guiding member coupled to the upper end of the member. The liquefied gas storage tank according to claim 7, wherein the upper end guiding member has a curved surface, and guides the liquefied gas to return to the flow inflow direction along the curved surface portion. The liquefied gas storage tank according to claim 7, wherein the residual water storage member has a residual water flow hole formed in an upper end portion thereof through which the liquefied gas moves. The inner frame unit is
A bottom support member provided at least at the bottom of the tank body member and having a "T"-shaped cross section; and a bottom support member that is coupled to an upper horizontal portion of the bottom support member, one end of which is connected to a horizontal portion of the bottom support member. 2. An inclined guide member coupled to one end and the other end coupled to the bottom of the tank body member for guiding the liquefied gas to move along the bottom support member. The liquefied gas storage tank described in . A ship, comprising: the liquefied gas storage tank according to any one of claims 1 to 10; and a ship body, in which the liquefied gas storage tank is provided and includes an engine section that provides driving force.

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