KR20150114023A

KR20150114023A - Cargo and barrier structure of the same

Info

Publication number: KR20150114023A
Application number: KR1020140037445A
Authority: KR
Inventors: 송길달; 이종규; 배준홍; 이민래
Original assignee: 삼성중공업 주식회사
Priority date: 2014-03-31
Filing date: 2014-03-31
Publication date: 2015-10-12
Also published as: KR101599353B1

Abstract

Disclosed are a cargo containment system and a barrier structure thereof. The barrier structure of a cargo containment system according to an embodiment of the present invention comprises: an upper insulating board arranged between a first barrier and a second barrier and including an upper protective plate and an upper insulating member placed below the upper protective plate; and a lower insulating board arranged between the upper part of the inner wall of the cargo containment system and the second barrier and including a lower protective plate and a lower insulating member placed above the lower protective plate. An inner hole extends in a vertical direction from a mounting groove, which has been formed on the upper end of the upper protective plate, inside the upper insulating member. A cover is arranged on the mounting groove. A stud bolt protrudes from the lower insulating board to be inserted into the inner hole. A shielding screen is installed on the inner hole to reduce heat transfer through the inner hole.

Description

CARGO AND BARRIER STRUCTURE OF THE SAME [0002]

The present invention relates to a cargo hold and its barrier structure.

The heat insulating board of a ship holding vessel for storing a cryogenic fluid (for example, liquefied natural gas (LNG)) can be installed by a mechanical fastening method using a stud bolt pre-installed on an inner hull or the like. Here, the upper and lower heat insulating boards may be made of a plywood protective plate and a heat insulating member made of reinforced polyurethane foam (R-PUF) at the lower part thereof. A round hole is machined at four corners of the upper insulation board, and the washer and the nut inserted into the space are fastened to the stud bolt installed on the upper part of the lower insulation board. After inserting a plug member made of a heat insulating material (for example, PU foam, EPS foam or the like) having excellent heat insulation performance for pure insulation, the hole processed at each corner of the heat insulating board is closed using a plywood material cover do.

However, in this process, various costs are incurred for manufacturing and installing the plug member. As a related technology, refer to Korean Patent Laid-Open No. 10-2013-0099900 (published on Sep. 19, 2013).

Korean Patent Laid-Open No. 10-2013-0099900 (published on September 20, 2013)

The embodiment of the present invention can effectively prevent heat transfer by radiation by applying a barrier structure having a barrier to an inner hole formed in an upper heat insulating board to a cargo hold and removes a conventional plug member, Which can reduce the cost of the cargo hold and its barrier structure.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

According to an aspect of the present invention, there is provided an upper insulating board disposed between a primary barrier and a secondary barrier, the upper insulating board including an upper insulating plate and an upper insulating member below the upper insulating plate; And a lower insulation board disposed between the upper portion of the inner wall of the cargo hold and the secondary barrier and including a lower protection plate and a lower insulation member at an upper portion of the upper insulation plate, And a stud bolt protruding from the lower heat insulating board so as to be inserted into the inner hole. In order to reduce heat transfer through the inner hole, The inner hole may be provided with a cargo barrier structure provided with a blocking membrane.

The shielding film may be attached to the exposed surface of the cover exposed to the inner hole in the form of a metal tape.

The shielding film may be provided in a form of a metal plate so that a peripheral portion thereof is inserted into the inner insertion groove of the upper protection plate or the upper insulation member forming the inner hole.

The barrier film may be made of a polished metal material.

Wherein the upper insulating board further comprises an upper auxiliary panel interposed between the upper insulating member and the secondary barrier and an impact absorbing layer interposed between the upper auxiliary panel and the secondary barrier, And a lower sub-panel interposed between the heat insulating member and the secondary barrier.

Wherein the stud bolt is vertically fixed to a moving block movably seated in a depressed portion of the lower sub-panel, and the upper peripheral portion penetrates through the secondary barrier so as to move along the contraction and expansion direction of the secondary barrier, A washer welded to the periphery of the hole and coupled to the stud bolt and having a peripheral portion in contact with the upper sub-panel; a washer coupled to the stud bolt and interposed between the washer and the moving block, A spacer for keeping the gap, and a nut fastened to the stud bolt so that pressure is applied to the washer.

According to another aspect of the present invention, there is provided a flat panel display comprising: an upper flat portion, a lower flat portion, both side wall portions, both side first inclined portions connecting the upper side flat portion and the side wall portions, 2 carcass, and the above-described barrier structure may be provided in at least one of the upper flat surface portion, the side wall portion and the first inclined portion.

The cargo hold and its barrier structure according to the present invention can effectively prevent heat transfer due to radiation by applying a barrier structure having a barrier to an inner hole formed in an upper insulation board to a cargo hold, , And the cost of manufacturing and installing the plug member can be reduced.

1 is a sectional view of a barrier structure of a vessel cargo hold according to an embodiment of the present invention.
Fig. 2 is an enlarged cross-sectional view of a portion A of the barrier structure of the hold of Fig. 1 in which the thermal stress reduction unit is installed.
3 is an exploded perspective view of the thermal stress reduction unit shown in Fig.
FIGS. 4 to 6 illustrate an example in which a barrier is formed in an inner hole formed in an inner vertical direction of the upper heat insulating member from a seating groove formed on the upper end of the upper protective plate, respectively.
Fig. 7 shows an example of a cargo hold to which the barrier structure of Fig. 1 is applied.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

Referring to Figure 1, the barrier structure of a vessel cargo hold that stores a cryogenic fluid (e.g., liquefied natural gas (LNG)) in accordance with an embodiment of the present invention includes an upper insulating board 10, a lower insulating board 60, A reduction unit and a shielding film 102.

The upper insulation board 10 is disposed between the primary barrier 7 and the secondary barrier 40 and includes an upper protection plate 11 on which a primary barrier 7 is disposed and an upper insulation member 12 ). The upper heat insulating member 12 is made of a polyurethane foam (PUF), a reinforced polyurethane foam (R-PUF) or the like to protect the hull from the cryogenic fluid. The upper protection plate 11 may be made of a material such as plywood. The primary barrier 7 described above is in direct contact with the cryogenic fluid and can be made of a metal material such as stainless steel (SUS) or the like. The secondary barrier 40 may be composed of a plurality of sheets made of a metal material such as stainless steel, aluminum, brass, or zinc, for example. As another example, the secondary barrier 40 may be composed of a composite sheet composed of a metal sheet and a fiber-reinforced composite material.

The upper insulating board 10 may further include an upper sub-panel 20 and an impact absorbing layer 30. The upper auxiliary panel 20 is interposed between the upper insulating member 12 and the secondary barrier 40. The upper sub-panel 20 may be made of plywood or the like.

The shock absorbing layer 30 is interposed between the upper sub-panel 20 and the secondary barrier 40 and protects the cargo barrier from sloshing shocks caused by the liquefied gas stored in the cargo hold. The shock absorbing layer 30 may be made of, for example, melamine foam as a foam material. Melamine foam is an open type foam based on amino resin type melamine resin, which not only absorbs impact but also has excellent heat insulation performance. However, the present invention is not limited to this, and the shock absorbing layer 30 can be made of various materials capable of protecting the cargo barrier from the sloshing shock caused by the liquefied gas stored in the cargo hold.

The lower insulation board 60 is disposed between the upper portion of the cargo hold inner wall 2 and the secondary barrier 40 and includes a lower protection plate 61 and a lower insulation member 62 thereon. The lower protection plate 61 can be fixed to the inner wall 2 of the ship by a mastic 4, a stud bolt 6, or the like. The lower protection plate 61 may be made of a material such as plywood. The lower heat insulating member 62 is made of a polyurethane foam (PUF), a reinforced polyurethane foam (R-PUF) or the like to protect the hull from the cryogenic fluid. The lower heat insulating member 62 may be bonded to the upper portion of the lower protective plate 61 with an adhesive (e.g., glue or the like). Insulating members 3 such as glass wool can be inserted and filled in the spaces between the lower heat insulating members 62 to maintain the heat insulating performance.

The lower insulation board 60 may further include a lower sub-panel 50. The lower sub-panel 50 is interposed between the lower heat insulating member 62 and the secondary barrier 40, and can be made of plywood or the like.

2 and 3, the thermal stress reduction unit is provided movably in accordance with the contraction expansion of the secondary barrier 40 to reduce thermal stress caused by the cryogenic fluid, and includes a moving block 70, 75, an engaging portion 80, and a spacer 90.

The movable block 70 is movably seated on the depression of the lower sub-panel 50 and is moved in the direction of the contraction and expansion of the secondary barrier 40, (W). The movement block 70 moves in accordance with the expansion and contraction of the secondary barrier 40, thereby reducing the thermal stress caused by the cryogenic fluid and improving the durability of the cargo barrier.

The moving block 70 may be provided with a coupling member, a coupling hole 71 having a screw thread formed at the center thereof, and a circular shape having a step. For example, a stud bolt 81 may be used as a coupling member. The moving block 70 may be formed such that the diameter of the second stepped portion 72 formed on the first stepped portion 73 with respect to the center line X is smaller than the diameter of the first stepped portion 73.

The depressed portion of the lower sub-panel 50 on which the moving block 70 is mounted may be provided to be larger than the width of the moving block 70 so that the moving block 70 is seated and movable. The depressed portion of the lower sub-panel 50 may be formed to have a height corresponding to the moving block 70, and the first depressed portion 51 and the second depressed portion 52, each having a circular step, . &Lt; / RTI >

Here, the diameter of the second depression (52) may be larger than the diameter of the first depression (51). The height of the first depressed portion 51 is set to be larger than the height of the first stepped portion 73 of the moving block 70 and the height of the first stepped portion 73 of the first stepped portion 73, At least a part thereof can be covered by the fixing piece 75 disposed in the second depression part 52. [

The fixing piece 75 may be a circular plate having a through hole 75a and may be fixed to the lower sub-panel 50 by a joining member including a rivet 76 and the like. The upper end of the fixing piece 75 disposed on the second depression 52 and the second stepped portion 72 of the moving block 70 may be located on the same plane.

The engaging portion 80 includes a stud bolt 81, a washer 82, and a nut 83. The stud bolt 81 is fixed to the engaging hole 71 of the moving block 70 in a vertical direction. An inner hole H is formed in a vertical direction inward of the upper heat insulating member 12 from a seating groove 11a (see FIG. 1) formed on the upper end of the upper protective plate 11. The stud bolt 81 is vertically fixed to the moving block 70 in such a manner as to be projected to be inserted into the inner hole H. [

The washer 82 is coupled to the stud bolt 81 and is disposed on the top of the spacer 90 so that the peripheral portion thereof is in contact with the upper end of the upper sub-

The nut 83 is disposed on the upper portion of the washer 82 and fastened to the stud bolt 81 so as to apply a predetermined pressure to the washer 82.

The spacer 90 is coupled to the stud bolt 81 and interposed between the washer 82 and the moving block 70. The spacer 90 supports the washer 82 and maintains a constant spacing between the washer 82 and the moving block 70. This allows the moving block 70 to effectively perform the sliding motion in accordance with the thermal deformation of the secondary barrier 40. [ The spacer 90 may be formed, for example, in a cylindrical shape passing through a central portion. The height of the spacer 90 may be equal to or smaller than the height of the upper portion of the upper sub-panel 20 when the spacer 90 is disposed on the upper portion of the moving block 70. The width of the spacer 90 may be smaller than the width of the second step portion 72, .

Hereinafter, a method of installing the thermal stress reduction unit will be described based on the contents of FIG. 2 and FIG.

The moving block 70 is mounted on the depressed portion of the lower sub-panel 50 so that the peripheral portion of the upper end of the first step portion 73 of the moving block 70 is at least partially covered by the fixing piece 75 And the fixing piece 75 is fixed to the second depressed portion 52.

Next, the moving block 70 and the secondary barrier 40 are welded together. Here, the shock absorbing layer 30 and the upper sub-panel 20 are stacked on the secondary barrier 40.

Next, the stud bolt 81 is engaged with the engaging hole 71 of the moving block 70, and the spacer 90 and the washer 82 are fixed to the upper portion of the moving block 70 with the stud bolt (81).

Next, the nut 83 is fastened to the stud bolt 81 so as to apply a predetermined pressure to the washer 82. At this time, a force is applied to the upper sub-panel 20, the shock absorbing layer 30 and the secondary barrier 40 interposed between the washer 82 and the moving block 70. As a result, effective coupling between the heat insulating members 12, 62, the auxiliary panels 20, 50, the secondary barrier 40, and the shock absorbing layer 30 can be achieved. However, it is possible to tighten the nut 83 so that the movement of the moving block 70 is not hindered by excessive force.

1 and 4, the shielding film 102 is installed in the inner hole H extending from the seating groove 11a formed at the upper end of the upper protective plate 11 to the inner vertical direction of the upper heat insulating member 12. The barrier can be made of a polished metal material. A cover 8 of, for example, a plywood material is joined to the seating groove 11a for finishing processing.

4, the shielding membrane 102 may be provided in the form of a metal plate, and a peripheral portion thereof may be inserted into an inner insertion groove of the upper heat insulating member 12 forming the inner hole H, as shown in FIG.

5, the shielding film 102 may be provided in the form of a metal plate and a peripheral portion thereof inserted into the inner insertion groove of the upper protection plate 11 forming the inner hole H, as shown in FIG.

6, the shielding film 102 may be attached to the exposed surface of the cover 8 exposed toward the inner hole H in the form of a metal tape. The metal tape may include aluminum tape (silver tape) or the like.

In addition to the methods shown in FIGS. 4 to 6, the blocking film 102 may be provided in the inner hole H by using various methods. For example, a groove may be formed on the upper end of the upper heat insulating member 12 to arrange the blocking film 102 in the corresponding groove.

Referring to FIG. 7, the cargo hold 100 to which the barrier structure of FIG. 1 is applied includes an upper flat portion 111 covering the upper portion of the accommodation space S for storing the fluid, a lower flat portion Side side wall portions 113 and 114 covering the side surface and both side first inclined portions 115 and 116 connecting the upper side plane portion 111 and the side wall portions 113 and 114. The lower side planar portion 112 and the side wall portions 113 and 114 And a pair of second inclined portions 117 and 118 connecting the first and second inclined portions 117 and 118, respectively. At this time, the barrier structure provided with the above-mentioned blocking film 102 may be installed in at least one of the upper side plane portion 111, the side wall portions 113 and 114 and the first inclined portions 115 and 116 of the hold 100, The remaining portions 112, 117 and 118 of the housing 100 may be provided with an existing barrier structure in which a plug member is provided in the inner hole H. [ In FIG. 7, the barrier structure of FIG. 1 is shown simplified to facilitate understanding, and is denoted by reference numeral 101.

The plug member is inserted into the (inner) hole formed in the corner portion of the heat insulating board in the related art, but in the embodiment of the present invention, the plug member is removed and the shielding film 102 is formed in the inner hole H Respectively. When the plug member is removed from the conventional barrier structure, the amount of heat transfer can be increased by the convection and radiation due to the heat conduction of the nitrogen gas filled in the hole.

The heat transferred by the convection moves from a high temperature to a low temperature. Therefore, for example, when the barrier structure (body) is provided on the upper flat portion 111 of the hold 100 in the form shown in Figs. 4 to 6, even if the plug member is removed regardless of whether or not the barrier film 102 is installed Heat transfer due to convection in the inner hole (H) hardly occurs. This is because the temperature at the bottom side in contact with the cryogenic fluid is low and the temperature is higher toward the upper side near the hull 1. Almost no heat transfer due to convection occurs in the side wall portions 113 and 114 and the first inclined portions 115 and 116 similarly to the upper side flat portion 111.

Therefore, only the heat transfer by radiation in the inner hole H is effectively blocked. For this, in the above-described embodiment of the present invention, the conventional plug member is removed from the inner hole H, and the barrier structure provided with the shielding film 102 is disposed on the upper side plane portion 111, the side wall portions 113 and 114 of the cargo hold 100, And the first inclined portions 115 and 116, respectively. At this time, the remaining portions 112, 117, and 118 of the hold 100 may be provided with an existing barrier structure in which a plug member is provided in the inner hole H. By providing the above-mentioned blocking film 102, the emissivity can be effectively lowered. Emissivity means the rate at which an object absorbs, transmits, or reflects external energy.

By arranging the barrier structure provided with the shielding film 102 on the upper side plane portion 111, the side wall portions 113 and 114 and the first inclined portions 115 and 116 of the hold 100 in this way, It is possible to eliminate the plug member and to reduce the cost of manufacturing and installing the plug member. In addition, by properly arranging the barrier structure according to the structure of the cargo hold, it is possible to overcome the limitations of the conventional barrier installation structure which is uniform and inefficient.

10: upper insulation board 20: upper auxiliary panel
30: shock absorbing layer 50: lower sub-panel
60: lower insulation board 70: movable block
75: Fixing piece 80:
90: Spacer 100:
101: barrier structure (sieve) 102: barrier film

Claims

An upper insulation board disposed between the primary barrier and the secondary barrier, the upper insulation board including an upper protection plate and an upper insulation member at a lower portion thereof; And
And a lower insulation board disposed between an upper portion of the inner wall of the cargo hold and the secondary barrier, the lower insulation board including a lower protection plate and a lower insulation member thereabove,
Wherein an inner hole extends from a seating groove formed on an upper end of the upper protective plate in a vertical direction inside the upper heat insulating member,
A cover is provided in the seating groove,
A stud bolt protruding from the lower heat insulating board to be inserted into the inner hole,
Wherein the inner hole is provided with a blocking membrane to reduce heat transfer through the inner hole.

The method according to claim 1,
Wherein the barrier is attached to the exposed surface of the cover exposed to the inner hole in the form of a metal tape.

The method according to claim 1,
Wherein the shielding film is provided in a form of a metal plate, and a peripheral portion is inserted into the inner insertion groove of the upper protection plate or the upper insulation member forming the inner hole.

The method of claim 3,
Wherein the barrier layer is made of a polishing metal material.

The method according to claim 1,
Wherein the upper insulating board further comprises an upper auxiliary panel interposed between the upper insulating member and the secondary barrier and an impact absorbing layer interposed between the upper auxiliary panel and the secondary barrier,
Wherein the lower insulation board further comprises a lower sub-panel interposed between the lower insulation member and the secondary barrier.

6. The method of claim 5,
Wherein the stud bolt is vertically fixed to a moving block movably seated on a depression of the lower sub-panel,
The upper peripheral portion is welded to the peripheral portion of the through hole of the secondary barrier so that the moving block is moved along the contraction and expansion direction of the secondary barrier,
A washer which is coupled to the stud bolt and has a peripheral portion contacting the upper sub-panel,
A spacer coupled to the stud bolt and interposed between the washer and the moving block to maintain a constant gap between the washer and the moving block,
And a nut fastened to the stud bolt such that pressure is applied to the washer.

Side flat portions, lower flat portions, both side wall portions, both side first inclined portions connecting the upper side flat portion and the side wall portions, and both side second inclined portions connecting the lower side flat portion and the side wall portions,
A cargo hold according to any one of claims 1 to 6, wherein the barrier structure is provided on at least one of the upper flat surface portion, the side wall portion and the first inclined portion.