KR101185518B1 - A cargo tank having wall with wire cellular structure - Google Patents

Abstract

The present invention is provided with a wire porous partition having excellent mechanical properties in the cargo hold to reduce the sloshing phenomenon of the cargo hold and to overcome the cargo loading constraints, and easy to install the wire porous partition. To provide a cargo hold having.
The cargo hold having the bulkhead of the wire perforated structure of the present invention is to be deployed between one side and the other side inside the storage tank to reduce the sloshing phenomenon in the storage tank 100 having a wall structure and the inside of the storage tank. And a second partition wall 200a of the wire porous structure installed to extend laterally between the first partition wall 200 of the installed wire porous structure or the plurality of pillar parts 310 and 320 standing on the storage tank 100. .

Description

Cargo tank with bulkhead of wire porous structure {A CARGO TANK HAVING WALL WITH WIRE CELLULAR STRUCTURE}

The present invention relates to a cargo hold having a bulkhead of a wire porous structure, and more particularly, a carrier for storing and transporting an LNG or a fluid cargo, which is a natural gas, a floating structure, a floating production storage facility, a floating LNG storage facility. The present invention relates to a cargo hold having a bulkhead of a wire porous structure which can be applied to various floating equipment such as the like.

In general, the membrane-type cargo hold uses a membrane sheet made of stainless steel as the primary barrier, a triplex as the secondary barrier, and an insulation panel as the heat shield.

Due to the characteristics of the fluid stored in the cargo hold having irregular movement, the prior art cargo hold has a sloshing phenomenon, which is a phenomenon in which the fluid is swung by the external excitation force, and thus the sloshing phenomenon with the fluid's own weight The load is generated by the impact force, the impact force and the moment component acts on the cargo hold.

The prior art cargo hold forms a chamfer at a specific portion of the horizontal wall and the vertical wall to solve the problem of sloshing, or as shown in FIG. A plurality of baffle plates) were installed in the cargo hold 1 to reduce the sloshing phenomenon.

The baffle plate 2 of the prior art is disposed at an installation height H2 of 25% to 30% relative to the overall height H1 of the cargo hold, and used for minimizing the impact force or impact force caused by the sloshing phenomenon. have.

However, the reduction means of the sloshing phenomenon of the prior art can only expect the reduction of the sloshing impact or the impact force at a specific portion or a predetermined height, and the sloshing impact at a portion other than the specific portion or a predetermined height. There is a disadvantage that can not prevent damage to the cargo hold.

That is, the sloshing reduction means of the prior art has the disadvantage that it is not possible to reduce the sloshing impact in response to the storage of both the low-filling level and the high-filling level in the cargo hold.

In addition, the prior art cargo hold is a plurality of horizontal girders (horizontal girder), web frame, bulk, if produced in an independent tank method, such as SPB (self-supporting prismatic-shape IMO Type B) Since the cargo tank structure has to be changed in order to install the protruding reinforcement structure inside the plate-type tank, such as a head, there is a disadvantage that it is very difficult to apply to the existing cargo hold structure instead of the SPB method.

In addition, the prior art cargo hold occupies a lot of space inside the cargo hold or is heavy due to the plate-shaped protruding reinforcement structure of the tank, which may be a limitation on the shipment volume of the cargo, and also requires a relatively large material cost compared to the cargo loading, resulting in productivity problems. Can be generated.

An object of the present invention is to provide a wire perforated bulkhead having excellent mechanical properties such as strength and rigidity in terms of weight and volume in the cargo hold, thereby reducing the sloshing phenomenon of the cargo hold and overcoming the cargo loading constraint. An object of the present invention is to provide a cargo hold having a bulkhead structure of a wire porous structure that is easy to install.

In addition, an object of the present invention is to provide a cargo hold having a partition of the wire porous structure that can be installed in the cargo hold of a lightweight wire porous structure without changing the cargo hold structure.

The object of the present invention described above is that a storage tank having a wall structure of a predetermined size to be described in detail below, and between one side and the other side inside the storage tank so as to reduce sloshing phenomenon in the storage tank. It can be achieved by a cargo hold having a partition of a wire porous structure including a partition of a wire porous structure installed to unfold.

In addition, according to the present invention, the partition wall may be installed in any one of the grid arrangement structure, parallel arrangement structure, inclined arrangement structure or through a combination of the above structure in the storage tank.

In addition, according to the present invention, the porous body constituting the partition wall is a first material which is a three-dimensional kagome truss assembly made by triaxial weaving a wire made of stainless steel or aluminum alloy so that lightweight porous cells are repeatedly combined. It may include.

According to the present invention, the porous body may further include a second material formed by inserting a plurality of reinforcing shaft members into the first material.

In addition, according to the present invention, the porous body may further include a third material incorporating a porous plate having a plurality of through holes on both sides of the first material in a sandwich structure.

In addition, according to the present invention, the partition wall has an end plate having a length corresponding to the porous body and a width greater than the thickness of the porous body so as to vertically abut each end of each of the porous body, and fixed in the end plate, respectively, vertical It may stand to include a frame plate for fixing both sides of the end of the porous body.

In addition, according to the present invention, the end plate may be welded to the cargo hold anchor or membrane sheet provided in the storage tank.

In addition, an object of the present invention is a wire perforation comprising a storage tank having a wall structure of a predetermined standard, and a partition of a wire porous structure attached to the plurality of pillars erected on the storage tank and spread between the pillars. A cargo hold with a bulkhead of the structure can be achieved.

In addition, according to the present invention, a damper assembly may be provided at both ends of the pillar to absorb the contraction and expansion of the pillar and to block heat transfer.

The cargo hold having the bulkhead of the wire perforated structure of the present invention has a sloshing impact corresponding to the storage of both the low filling level and the high filling level by installing the partition wall so as to be spread between one side and the other side inside the storage tank of the cargo hold. It can be reduced, there is an advantage that can protect the cargo hold and hull from sloshing impact.

In addition, the cargo hold having a bulkhead of the wire porous structure of the present invention has an advantage that the bulkhead itself can overcome the loading constraints because it does not use a lot of installation space as a porous structure.

In addition, the cargo hold having the bulkhead of the wire porous structure of the present invention is very easy to handle and install by fixing the bulkhead of the wire porous structure with excellent weight and mechanical properties to the storage tank using a frame plate and end plates. There is this.

In addition, the cargo hold having a partition of the wire porous structure of the present invention is installed by using the cargo barrier anchor or membrane sheet as the primary barrier, there is an advantage that it is very easy to apply to the existing cargo hold structure.

In addition, the cargo hold having the bulkhead of the wire porous structure of the present invention has a merit that can satisfy both the sloshing problem and the productivity problem, as the material cost is relatively small compared to the amount of cargo shipments required for installing the bulkhead of the wire porous structure.

1 is a cross-sectional view of a cargo hold of the prior art.
2 is a perspective view showing a cross section of a cargo hold having a partition of a wire porous structure according to a first embodiment of the present invention.
3 is a view for explaining a material for a partition shown in FIG. 2.
4 is a cross-sectional view illustrating a coupling relationship between a first partition wall and a storage tank illustrated in FIG. 2.
5 and 6 are perspective views for explaining the arrangement relationship of the first partition wall.
7 is a perspective view showing a cross section of a cargo hold having a partition of a wire porous structure according to a second embodiment of the present invention.
FIG. 8 is an enlarged cross-sectional view of circle A shown in FIG. 7.
FIG. 9 is an enlarged cross-sectional view of circle B shown in FIG. 7.

Hereinafter, a cargo hold having a partition having a wire porous structure according to embodiments of the present invention will be described in detail with reference to FIGS. 2 to 9.

The following specific examples are merely illustrative of the cargo hold having a partition of the wire porous structure according to the present invention, but are not intended to limit the scope of the present invention.

1st Example

As shown in Figure 2, the cargo hold of the present invention is a storage tank 100 having a wall structure of a predetermined size, such as the tank of any one of the membrane type or independent tank type, and in the interior of such a storage tank 100 It may include a first partition wall 200 of the wire porous structure that is installed to reduce the sloshing phenomenon.

For example, the storage tank 100 may be manufactured by a membrane method, and in this case, the bottom plate 110 having a substantially rectangular shape, and left and right bottoms formed to have an arrangement shape of light beams at both ends of the lower plate 110. The left and right side plate portions 130 and 131, which are erected upward from the top of each of the inclined plate portions 120 and 121 and the left and right lower inclined plate portions 120 and 121, and extend in the forehead direction, and such left and right sides. It is connected to the upper left and right upper inclined plate portion 140, 141 formed to be inclined toward the center of the storage tank 100 at the upper end of each side plate portion (130, 131), such as the left and right upper inclined plate portion (140, 141) It may include a top plate portion 150 extending in the fore and aft direction, and a front plate portion and a rear plate portion to seal the front and rear of the storage tank 100.

The plate for the storage tank 100 may be formed of a stainless steel material or an aluminum alloy material. The stainless steel material or the aluminum alloy material may have low temperature resistance that is not damaged even by the temperature of the liquefied natural gas (about -163 ° C).

The storage tank 100 may include a heat dissipation material determined by the corresponding tank standard.

The storage tank 100 may include a barrier defined by the tank standard. For example, the membrane sheet 170 (see FIG. 4) corresponding to one barrier of the membrane storage tank may be formed of a stainless steel material or an aluminum alloy material in the same manner as the plate for the storage tank 100, and the storage tank ( 100) can be installed.

The storage tank 100 may be provided with a cargo hold anchor 160 (see FIG. 4) used to fix the membrane sheet 170, which is a barrier defined by the tank standard.

The cargo hold anchor 160 may be formed of stainless steel or aluminum alloy. The cargo hold anchor 160 may serve to fix the membrane sheet 170 to the wall 180 for the storage tank 100 and support between the membrane sheet 170 and the wall 180.

In particular, the cargo hold anchor 160 or the membrane sheet 170 is welded to the end plate 220 or fastened to the bolt nut, and supports the first partition wall 200 of the wire porous structure through the frame plates 230 and 231. Can play a role.

The end plates 220 and the frame plates 230 and 231 may be formed of a metal having a low temperature brittleness such as an aluminum alloy, an invar, and 9% nickel steel.

As shown in FIG. 3, the porous body 210 of the partition wall according to the present invention may be formed of a material having a light porous structure having excellent mechanical properties.

The material having a wire-porous structure of the present invention may be one of the first material (a) of the basic type, the second material (b) of the shaft member insertion type, and the third material (c) of the sandwich type or a combination thereof. have.

The first material (a) may be a three-dimensional kagome truss assembly made by triaxially weaving a wire made of stainless steel or aluminum alloy so that the lightweight porous cells are repeatedly combined. This first material (a) may be a commodity such as a wire woven bulk kagome (WBK).

The second material (b) is the same material as the wire to insert a plurality of reinforcing shaft members 240 and 241 corresponding to the structural steel, bar, stringer, etc. into the first material (a) Can be formed. The second material (b) may increase the structural rigidity relative to the first material (a).

The third material (c) is integrated in a sandwich structure on both sides of the first material (a) and has a plurality of through holes 252 and may include porous plates 250 and 251 of the same material as the wire. The porous plates 250 and 251 may be fixed to both sides of the first material a, for example, by a known mechanical joining method such as welding. The third material (c) may further increase the structural rigidity relative to the first material (a) and the second material (b).

The porous body 210 of the barrier rib of the wire porous structure, which may be formed by any one or a combination of the first to third materials (a), (b), and (c), may have an empty space except for the woven wire. When passing the fluid through, the fluid interferes with the wires of the porous body of the partition wall and serves to lower the flow rate of the fluid.

The fluid may pass through the void spaces between the wires and may flow around the wire's surface.

The bulkhead of such a wire porous structure can provide the present invention with a relatively excellent sloshing reduction performance compared to simply passing through a hole in a conventional porous baffle plate.

Hereinafter, the coupling relationship between the first partition wall 200 and the storage tank 100 of the wire porous structure will be described with reference to FIG. 2 or FIG. 4.

As shown in FIG. 4, the first partition wall 200 of the present invention has a porous body 210 formed of the material described above with reference to FIG. 3, and the porous body 210 abuts perpendicularly to an end of each of the porous bodies 210. End plate 220 having a length corresponding to the body 210 and a width larger than the thickness of the porous body 210, and is fixed in the end plate 220, respectively, standing vertically, both sides of the end of the porous body 210 It may include a frame plate 230, 231 for fixing the.

As shown in FIG. 4, the end plate 220 and the frame plates 230 and 231 may be manufactured in a size and thickness designed to safely support the porous body 210 to be installed in the storage tank 100. The end plate 220 and the frame plates 230 and 231 may be formed of stainless steel or aluminum alloy.

The porous body 210, the end plate 220, and the frame plates 230 and 231 may be fixed to each other by welding on the basis of close contact with or contact with each other.

For example, the frame plates 230 and 231 and the porous body 210 may be fixed by mutual welding, and for the double safety coupling, the frame plates 230 to the frame plates 230 and 231 and the porous body 210 may be fixed. After forming the fastening hole in the plate thickness direction of the, 231 can be coupled to each other by mounting the bolt nut fastening structure 290.

In addition, the end plate 220 may be welded to the cargo hold anchor 160 to be basically supported.

The end plate 220 may be welded to the membrane sheet 170 as the primary barrier.

As such, the first partition wall 200 having the wire porous structure may be installed and supported in the storage tank 100 while obtaining the effect of expanding the support area by the end plate 220.

Here, the first partition wall 200 having a wire porous structure may be installed using the end plate 220 and the frame plates 230 and 231 without structural change of the storage tank 100, so that the wall structure of any tank standard may be installed. Can be applied.

Referring to FIG. 2, the first partition wall 200 having a wire porous structure is disposed between the lower plate part 110, which is one side of the inside of the storage tank 100, and the upper plate part 150, which is the other side thereof, so that the lower plate 110 and It may be installed to be supported by the top plate 150.

In this case, since the first partition wall 200 having the wire porous structure extends in the bow direction and spreads out in the vertical direction, even if the cargo is in any filling level, the sloshing phenomenon of the cargo can be reduced.

As shown in FIG. 2, the first partition wall 200 having a single wire porous structure is arranged in the bow direction, or the other partition walls 201 and 202 having a plurality of wire porous structures corresponding to the tank standard as indicated by the point islands. It may be further arranged in the fore and aft direction.

In addition, as shown in FIG. 5, the other barrier ribs 200 and 203 having the wire porous structure may be installed in a lattice arrangement structure such that the bow direction and the ship width direction intersect.

In addition, as shown in FIG. 6, the horizontal partition wall 204 having the wire porous structure may be spaced apart in parallel with the lower plate 110 to be installed in the storage tank 100 in a parallel arrangement structure.

In this case, the plurality of supports 300 may be installed in the storage tank 100 to support the horizontal partition wall 204 based on the lower plate part 110.

In addition, the plurality of hook wires 310 may be installed in the storage tank 100 to suspend the horizontal partition wall 204 based on the upper plate part 150.

In addition, as indicated by a dotted line in FIG. 6, the inclined partition wall 205 having a wire porous structure may be installed inside the storage tank 100 in an inclined arrangement structure compared to the lower plate 110 or the upper plate 150. have.

Various other partition walls 201, 202, 203, 204, and 205 arrangement structures including the various first partition walls 200 may be included in the scope of the present invention, and various combinations of the structures may be applied.

The fluid of the storage tank 100 passes through various other partitions 201, 202, 203, 204, and 205, including the first partition 200 as described above, respectively, and as a result, the flow velocity of the fluid decreases, resulting in a sloshing phenomenon. The impact force or impact force can be minimized.

Second Example

The cargo hold having the bulkhead of the wire porous structure of the present invention described in this embodiment is provided with a second bulkhead suspended from the plurality of pillars so as to be spaced apart from the lower and upper plates of the storage tank. Same as the first embodiment. Therefore, the same or similar reference numerals will be given to the same or corresponding components in FIGS. 1 to 9, and the description thereof will be omitted here.

As shown in FIG. 7, the second partition wall 200a may be partially expanded in the storage tank 100 to reduce a sloshing phenomenon having a predetermined height range from an inner surface of the storage tank 100.

The second partition wall 200a for this is attached along the pillars 310 and 320 at a predetermined height of the plurality of pillars 310 and 320, and the porous body is installed to be spread between the pillars 310 and 320. And 210.

The porous body 210 may be formed of the material shown in FIG. 3.

The pillars 310 and 320 may be erected based on the lower plate 110 and the upper plate 150 in the up and down direction of the storage tank 100, and may be disposed at predetermined intervals in the bow direction.

Since the pillar portions 310 and 320 are in direct contact with the liquefied natural gas in the cryogenic state, the pillar portions 310 and 320 may be formed of a metal having low temperature brittleness such as aluminum alloy, invar, and 9% nickel steel, which can cope with heat shrinkage deformation. Can be.

As shown in FIG. 8, the second partition wall 200a has a porous body 210 that may be formed of the material described above with reference to FIG. 3, and the porous body 210 may be perpendicular to the end of each of the porous bodies 210. An end plate 220a having a length corresponding to the body 210 and a width greater than the thickness of the porous body 210 and fixed at both ends of the end plate 220a are vertically established so that the end of the porous body 210 It may include a frame plate (230a, 231a) for fixing both ends of the end portion.

The end plate 220a and the plurality of frame plates 230a and 231a surround the ends of the porous body 210 in the cross-sectional shape of the Korean letter 'c' or the angled 'u' letter, and by welding, the porous body 210. And can be fixed.

The end plate 220a may be welded to the surface of the pillar 320.

Also, for the double safety coupling, the bolt nut fastening structure 290 is framed in the plate thickness direction of the frame plates 230 and 231 so as to mutually fix the ends of the frame plates 230a and 231a and the porous body 210. The fastening holes penetrating the ends of the plates 230a and 231a and the porous body 210 may be further fastened to the second partition wall 220a.

As shown in FIG. 9, the pillar part 320 may be installed based on the wall 180 of the lower plate part or the upper plate part of the storage tank 100.

The pillar portion 320 may include damper assemblies 330 at both ends of the pillar body portion 325 so as to block heat transfer and absorb the contraction and expansion of the pillar portion 320.

The damper assembly 330 of the pillar part 320 includes a base part 331 which welds one end portion to the wall 180 of the lower plate part or the upper plate part of the storage tank 100, and an agent formed at the other end of the base part 331. 1 damper block portion 332, the damper block portion 333 of the material which is laminated to the first flange portion 332 and capable of blocking the heat transfer, shrinkage and expansion within a predetermined design range, and such a damper block portion 333 A second flange portion 334 stacked and connected to a pillar body portion 325 which is an intermediate body of the pillar portion 320, and the first flange portion 332 and the damper block portion 333, which are sequentially stacked. A plurality of bolt nut fastening means 335 fastening the two flange portion 334 may be included.

In addition, the material of the damper block portion 333 may be formed of any one of a wood material, a rigid heat insulating material containing glass fiber, and a composite material combining these materials.

The damper assembly 330 of the column part 320 includes a membrane sheet 170 as a primary barrier, a first heat dissipation layer 171, and a triplex layer 172 as a secondary barrier, as defined by the tank specification of the storage tank 100. In addition, the heat dissipation blocking structure including the second heat dissipation layer 173 may be disposed to maintain airtightness.

In addition, the second partition wall 200a illustrated in FIG. 7 includes two pillar portions 310 and 320 and one porous body 210 in one set. When the application is configured as a plurality of sets, the plurality of second partitions 200a may be disposed and installed in various places inside the storage tank 100.

Various arrangement structures in which the plurality of porous bodies are installed in the transverse direction or the longitudinal direction between the plurality of pillar parts may all be considered to be included in the scope of the present invention.

Such a technical configuration of the present invention will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, the scope of the present invention is represented by the following claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. Should be interpreted.

100: storage tank 160: cargo hold anchor
170: membrane sheet 180: wall
200 to 205, 200a: partition 210: porous body
220, 220a: End plate 230, 231, 230a, 231a: Frame plate
310, 320: pillar portion 333: damper block portion

Claims (11)

delete delete In a cargo hold having a storage tank having a wall structure and a partition wall provided inside the storage tank,
The porous body constituting the partition wall
It includes a first material which is a three-dimensional kagome truss assembly made by triaxial weaving a wire made of stainless steel or aluminum alloy to repeatedly combine the lightweight porous cells
Cargo hold with bulkhead of wire perforation structure.
The method of claim 3,
The porous body
And a second material formed by inserting a plurality of reinforcing shaft members into the first material.
Cargo hold with bulkhead of wire perforation structure.
The method of claim 3,
The porous body
And a third material incorporating a porous plate having a plurality of through holes in a sandwich structure on both sides of the first material.
Cargo hold with bulkhead of wire perforation structure.
The method according to any one of claims 3 to 5,
The partition wall
An end plate having a length corresponding to the porous body and a width greater than the thickness of the porous body so as to vertically contact the ends of each of the porous bodies;
Fixed to the end plate, each vertically erected, including a frame plate for fixing both sides of the end of the porous body
Cargo hold with bulkhead of wire perforation structure.
The method of claim 6,
The end plate is
Welded to a cargo hold or membrane sheet provided in the storage tank
Cargo hold with bulkhead of wire perforation structure.
The method of claim 3,
Further comprising a plurality of pillars erected inside the storage tank for installing the partition wall
Cargo hold with bulkhead of wire perforation structure.
The method of claim 8,
And a damper assembly provided at both ends of the pillar to absorb the contraction and expansion of the pillar and to block heat transfer.
Cargo hold with bulkhead of wire perforation structure.
10. The method of claim 9,
The damper assembly is
A base part of which one end is welded to a wall of the lower plate part or the upper plate part of the storage tank;
A first flange portion formed at the other end of the base portion;
A damper block portion of a material laminated on the first flange portion and capable of blocking heat transfer, contracting, and expanding within a predetermined design range;
A second flange portion stacked on the damper block portion and connected to the pillar body portion, which is an intermediate body of the pillar portion;
And a plurality of bolt nut fastening means for fastening the first flange portion, the damper block portion, and the second flange portion to each other.
Cargo hold with bulkhead of wire perforation structure.
The method of claim 10,
The damper block portion
It is formed of any one of a wood material, a rigid heat insulating material containing glass fiber, and a composite material combining the above materials
Cargo hold with bulkhead of wire perforation structure.

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