KR20150129893A - Cargo barrier structure - Google Patents

Abstract

A cargo barrier structure is disclosed. According to an embodiment of the present invention, the cargo barrier structure comprises: an upper insulation board interposed between a first barrier and a second barrier, and having an upper protection plate and an upper insulation member in a lower portion of the upper protection plate; and a plurality of strip members inserted into a coupling groove formed on the upper protection plate, wherein the first barrier is installed in an upper portion. A fixing bolt to install a welding rail for welding the first barrier is arranged in at least one central portion of the strip members.

Description

Cargo barrier structure {CARGO BARRIER STRUCTURE}

The present invention relates to a cargo hold barrier structure.

Cargo liquefied natural gas (LNG) cargo holds a liquefied natural gas cooled to approximately -163 ° C, so it is made of materials that can withstand cryogenic temperatures. It is resistant to thermal stress and heat shrinkage, and has an insulation structure . The cargo hold has a primary barrier, an upper insulation board, a secondary barrier and a lower insulation board in an outward direction from the inside, and is provided in a state of being coupled with an inner hull.

Here, the primary barrier is formed to have corrugated corrugation, and the corrugation is deformed by a certain amount when heat shrinkage occurs, thereby reducing the thermal stress at the welded portion. Since the primary barrier is in direct contact with LNG, which is a cryogenic fluid, and LNG sloshing occurs during operation, the corrugation may be warped or deformed by the sloshing load.

Therefore, the shape of the corrugation can be modified to reinforce the resistance against the sloshing load. As a result, the shape of the portion where the corrugations cross each other is also deformed.

However, when a primary wall is welded, a welding device is installed after the clamp device is installed at the intersection of the corrugation. However, the clamp device may not be installed due to the shape deformation of the corrugation intersection. Korean Patent Laid-Open No. 10-2012-0029774 (published on Mar. 27, 2012) discloses a device for primary barrier welding.

Korean Patent Publication No. 10-2012-0029774 (published on Mar. 27, 2012)

An embodiment of the present invention seeks to provide a cargo barrier structure in which the welding rails for primary barrier welding can be easily installed.

According to an aspect of the present invention, there is provided an upper insulation board, which is interposed between a primary barrier and a secondary barrier, and includes an upper protection plate and an upper insulation member at a lower portion thereof; And a plurality of strip members installed in the coupling grooves formed in the upper protection plate, wherein the primary barrier is installed on the upper portion of the strip member, A cargo hold barrier structure provided with a fixing bolt can be provided.

A fixing strip member at the center of the upper protective plate provided at an intersecting position between the strip members slidable in accordance with the expansion and contraction of the primary barrier among the strip members is fixed to the coupling groove and the fixing bolt is fixed to the fixing strip member And may be provided at the central portion.

An auxiliary plate is disposed above both end portions of the fixed strip member in a state where the fixed strip member is seated in the coupling groove, and a first coupling member fastened to the coupling hole of the auxiliary plate is provided between the auxiliary plate and the upper protection plate And the coupling between the auxiliary plate and the strip member can be performed by the second coupling member fastened to the thread hole of the auxiliary plate.

The fixing strip member may have a shape corresponding to the coupling groove of the upper protection plate and may be seated in the coupling groove, and both ends may be coupled to the upper protection plate by a coupling member.

The fixing strip member may form a screw groove in the central portion so that the fixing bolt is screwed.

The fixing bolt includes a stud bolt, and may be welded to an upper surface of a central portion of the fixing strip member.

The primary barrier may form a concave shaped joint surface welded to the fixed strip member around the fixing bolt at a peripheral portion corresponding to a position where the fixing bolt is installed.

Wherein the lower insulation board comprises a lower protection plate, a lower insulation member thereabove, and a lower sub-panel interposed between the secondary insulation and the lower insulation member, The secondary barrier is provided to cover a space formed between the lower heat insulating boards on both sides, and a second secondary barrier adjacent to the stud bolt, And a joining surface joined to the fixing piece by a circular welding method may be formed at a peripheral portion corresponding to the position where the stud bolt is installed.

Wherein the lower heat-insulating board has a predetermined thickness and is formed in the shape of a square having the same width and the same length, the upper heat-insulating board is disposed so as to extend over the lower heat-insulating board on both sides, A connection board may be disposed in a space formed between the upper heat insulating boards so as to be disposed on the same plane as the upper heat insulating board.

The cargo hold barrier structure according to an embodiment of the present invention facilitates installation of a welding rail for first barrier welding.

In addition, it is possible to overcome the limitations of conventional barrier arrangements using the primary secondary barrier and the secondary secondary barrier, and to install the secondary barrier easily and efficiently.

In addition, the horizontal and vertical lengths of the lower heat-insulating board are formed in accordance with the same set dimensions, and the secondary walls are connected to each other around the stud bolts vertically fixed to the fixing pieces provided on the center of the lower heat- By installing the upper insulation board in such a manner that the corner portions of the upper insulation board are combined, the cargo barrier can be effectively installed with a small number of people and time.

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.

1 is a perspective view of a vessel cargo hold wall structure according to an embodiment of the present invention.
Fig. 2 is a perspective view of the lower insulation board arrangement of the barrier structure of Fig. 1. Fig.
FIG. 3 is a perspective view illustrating a state in which a secondary barrier is provided on the lower heat-insulating board of FIG. 2. FIG.
FIG. 4 is a perspective view illustrating a state in which an upper heat insulating board is installed on the upper part of the secondary barrier shown in FIG. 3. FIG.
FIG. 5 is a cross-sectional view illustrating a coupling relationship between the upper and lower insulating boards of FIG. 4; FIG.
FIG. 6 is a perspective view illustrating a state in which a connection board is installed between the upper heat insulating boards of FIG.
FIG. 7 is a view showing a state in which a strip member is installed on an upper part of the upper insulation board among the barrier structures shown in FIG. 1;
FIG. 8 is a cross-sectional view illustrating the installation of a strip member slidable in accordance with the movement of the primary barrier which contracts and expands due to thermal stress among the strip members of FIG. 7;
9 and 10 are cross-sectional views illustrating another embodiment of the fixing strip member of the strip member of FIG. 7 as another example.
FIG. 11 is a plan view showing a state in which primary barriers are connected to each other around a fixing bolt provided at a central portion of a fixing strip member among the strip members of FIG. 7;
FIG. 12 is a perspective view showing a welding bar for welding a primary barrier in a fixing bolt provided at a central portion of a fixed strip member in FIG. 7; FIG.

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 FIG. 1, a barrier structure of a vessel cargo hold that stores a cryogenic fluid (e.g., liquefied natural gas (LNG)) according to an embodiment of the present invention includes a lower insulation board 110, a secondary barrier 120, A board 130 and a connection board 135.

The lower insulation board 110 is arranged in a plurality of rows and columns in the upper part of the inner wall of the cargo hold and has a lower protection plate 111, a lower insulation member 112, And a lower sub-panel (113). The lower heat-insulating board 110 may be formed as a unitary unit and arranged side by side on the inner wall of the cargo hold. The lower heat-insulating board 110 may have a predetermined thickness and may have a square shape having the same width and the same length. For example, the lower insulating board 110 may be manufactured to have a size of 1 m having the same length and width.

The lower protection plate 111 may be fixed to the inner wall of the cargo hold by a mastic, a stud bolt or the like. The lower protection plate 111 can be made of, for example, a material such as plywood. The lower heat insulating member 112 is disposed on the lower protective plate 111 and is made of a polyurethane foam (PUF), a reinforced polyurethane foam (RPUF, Reinforced PUF) or the like to protect the hull from the cryogenic fluid can do. The lower heat insulating member 112 may be bonded to the upper portion of the lower protective plate 111 by an adhesive (e.g., glue or the like).

Referring to FIG. 2, a fixing piece 210 having a stud bolt 211 vertically fixed is provided on a central portion of the lower sub-panel 113. The fixing piece 210 may be made of a metal material including, for example, stainless steel or the like. The fixing member 210 may be coupled to the coupling groove 113a formed in the lower sub-panel 113 and fixed by a fastening member 2 such as a rivet or the like. The fixing piece 210 may be formed in a circular shape. The lower sub-panel 113 may be made of plywood or the like.

3, the secondary barrier 120 is disposed on the lower insulation board 110 to cover a space formed between the lower insulation boards 110 on both sides of the lower insulation board 110, And are arranged side by side to be connected to the other secondary barrier 120. Although not shown, a filling member such as a glass wool may be inserted into the space formed between the lower heat insulating boards 110. However, the filling member may be omitted when the neighboring lower heat insulating boards 110 are arranged closely to each other or when the lower heat insulating boards 110 are integrally formed by bundling the lower heat insulating boards 110 in close contact with each other.

The secondary barrier 120 forms bonding surfaces 120a and 120b to be welded (W, see FIG. 5) to the fixing piece 210 at a peripheral portion corresponding to the position where the stud bolt 211 is installed. At this time, the joining surfaces 120a and 120b may be joined to the fixing piece 210 in a circular welding manner. The joining surfaces 120a formed at both ends of the joining surfaces 120a and 120b form a semicircular groove so that the joining surfaces 120a of the adjacent secondary walls 120 adjacent to the stud bolts 211, And the joint surface 120b formed at the corner may be chamfered and formed obliquely inclined. The periphery of the neighboring secondary barrier 120 can be partially welded to each other with the stud bolt 211 as a center. In the conventional hold wall structure, the lower insulation board is generally formed in a rectangular shape, and accordingly, the length of welding between the main secondary barrier and the auxiliary secondary barrier is long, There were difficult aspects. The lower insulation board 110 may be manufactured in the above-described manner and disposed above the inner wall of the cargo hold, and the secondary barrier 120 may be disposed thereon by the above-described method. In addition, it is possible to overcome the limitations of conventional barrier arrangements using the primary secondary barrier and the auxiliary secondary barrier, and uniformly install the secondary barrier 120 of a single product easily and efficiently.

The secondary barrier 120 may have a portion 120c covering a space formed between the lower heat insulating boards 110 in a corrugated shape having a downward convex shape. This is to effectively cope with heat shrinkage due to the cryogenic fluid. The secondary barrier 120 may have a lateral length equal to the lateral length of the lower insulating board 110 and a vertical length equal to three times the vertical length of the lower insulating board 110. Through this, the secondary barrier 120 can cover four longitudinally arranged lower heat-insulating boards 110 and two laterally arranged lower heat-insulating boards 110. For example, the secondary barrier 120 may have a length of 1 m and a length of 3 m. The secondary barrier 120 may be composed of a plurality of sheets made of a metal material such as stainless steel, aluminum, brass, zinc, or the like. As another example, a composite sheet made of a metal sheet and a fiber reinforced composite material may be provided.

4, the upper insulation board 130 is interposed between the secondary barrier 120 and the primary barrier contacting the cryogenic fluid, and includes an upper protection plate 131 and an upper insulation member 132 below the upper protection plate 131 do. The upper insulating board 130 may have a predetermined thickness and may have the same length and width. In addition, the upper heat insulating board 130 may be formed in the same shape and size as the lower heat insulating board 110.

The upper protection plate 131 may be made of a material such as plywood. The upper heat insulating member 132 may be made of a polyurethane foam material, a reinforced polyurethane foam, or the like to protect the hull from the cryogenic fluid. The primary barrier 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 upper insulating board 130 is disposed on the lower insulating board 110 on both sides and is disposed at a predetermined interval on the secondary barrier 120 in such a manner that the corner portions are coupled to the stud bolts 211 . As shown in FIG. 4, the upper heat insulating board 130 covers two lower heat insulating boards 110 on both sides, and each corner is connected to the stud bolts 211 of the lower heat insulating board 110 . Accordingly, the space formed between the lower insulating boards 110 is covered by the upper insulating board 130, thereby preventing the leakage of the cryogenic fluid and improving the heat insulating effect.

5, the upper insulating board 130 includes an upper auxiliary panel 134 interposed between the upper insulating member 132 and the secondary barrier 120, an upper auxiliary panel 134 and a secondary barrier 120 To protect the cargo barrier walls from sloshing shocks caused by liquefied gas stored in the interior of the cargo hold. The shock absorbing layer 133 may be omitted in another example. The upper sub-panel 134 may be made of plywood or the like. The shock absorbing layer 133 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 133 may 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 upper insulating board 130, the upper auxiliary panel 134, and the impact absorbing layer 133 may be integrally formed.

Each of the corners of the upper insulating board 130 is formed with an inner hole 130a so that the washer 212 and the nut 213 inserted through the inner hole 130a are inserted into the impact absorbing layer 133 and the upper auxiliary panel 134, And the washer 212 presses the upper sub-panel 134 by tightening the nut 213. The nut 213 is fastened to the stud bolt 211 protruding toward the inner hole 130a through the through- A plug member (not shown) filled with a foam or the like may be disposed in the inner hole 130a and may be finished by a cover (not shown) made of plywood or the like.

Referring to FIG. 6, the connection board 135 is interposed in a space formed between the upper heat insulation boards 130. Thereby, a space formed between the lower heat insulating boards 110, which is not covered by the upper insulating board 130, is covered by the connecting board 135. The connection board 135 is sandwiched between the upper insulation boards 130 and bonded to the neighboring upper insulation board 130 by an anchor plate 150 to be described later. The connection board 135 is sandwiched between the upper heat insulation boards 130 in a form of covering two lower insulation boards 110 on both sides.

The connection board 135 includes a connection protection plate 136 and a connection insulation member 137 below the connection protection plate 136 so as to be coplanar with the upper insulation board 130. Although not shown, when the upper heat insulating board 130 further includes the shock absorbing layer 133 and the upper sub-panel 134 so that the connecting board 135 is coplanar with the upper insulating board 130, And may further include corresponding members respectively. At this time, each member may be made of the same material and thickness as the impact absorbing layer 133 and the upper sub-panel 134.

The connection protection plate 136 and the connection insulation member 137 may be made of the same material as the upper protection plate 131 and the upper insulation member 132, respectively. At this time, the upper insulating board 130 and the connecting board 135 are inserted into grooves formed on one side surface of the upper insulating board 130 and one side of the connecting board 135. Either one of the opposite ends is fixed and the other is connected to the upper insulating board 130 and the connecting board 135 An anchor plate 150 may be provided to bind the upper insulating board 130 and the connecting board 135 in a manner to press one of them. For example, when one side of the anchor plate 150 is coupled to the upper heat insulating board 130 by a fastening member such as a rivet or the like, the other side of the anchor plate 150 presses the neighboring connecting board 135.

7 and 8, strip members 160 and 161 are provided in the coupling groove D1 formed in the upper protective plate 131, and a primary barrier is disposed on the upper portions of the strip members 160 and 161. As shown in FIG. The fixed strip member 161 disposed at the center of the upper protective plate 131 is fixed so as not to be slid and the remaining strip members 160 slide according to the movement of the primary barrier which expands and contracts due to thermal stress. At this time, the primary barrier is installed in such a manner as to press the upper part of the slidably installed strip member 160, so that the strip member 160 can slide together with the contraction expansion of the primary barrier. The strip members 160 and 161 may be made of, for example, stainless steel or the like.

8, the slidable strip member 160 is seated in the engaging groove D1 of the upper protective plate 131. As shown in Fig. The coupling groove D1 is provided in a stepped shape, and the auxiliary plate 165 supports both ends of the strip member 160 in such a manner as to press from above. The binding member 2 such as a rivet or the like may be fastened to the upper protective plate 131 and the upper heat insulating member 132 through the binding hole H1 of the auxiliary plate 165. [ The auxiliary plate 165 may be formed with a thread hole H2 to which a coupling member (not shown) such as a bolt is coupled. This is to temporarily fix the strip member 160 so that the strip member 160 is not slid downward due to its own load by fastening the binding member to the thread hole H2 when the cargo hold wall is installed in the longitudinal direction .

7 and 9, the fixing strip member 161 at the center of the upper protective plate 131 is fixed at an intersection position between the strip members 160 slidable in accordance with the expansion and contraction of the primary barrier 170 . At this time, a binding member 3 such as a bolt is fastened to the thread hole H2 of the auxiliary plate 165 while both ends of the fixed strip member 161 are pressed by the above-described auxiliary plate 165, The connection between the fixing strip member 161 and the fixing strip member 161 can be performed. The binding member 3 fastened to the thread hole H2 can be fastened to the upper protection plate 131 through the through hole of the strip member 161 to fix the fixing strip member 161. [

A fixing bolt 310 for installing a welding rail 320 (see FIG. 12) for welding the primary barrier 170 may be provided on a central portion of the fixed strip member 161. However, the present invention is not limited thereto, and may be provided at one or more central portions of the above-described strip members 160 and 161 as required. The fixing bolt 310 may include a stud bolt or the like. At this time, the fixing strip member 161 may be formed with a screw groove 161a having a predetermined depth at a central portion so that the fixing bolts 310 are screwed.

10, the stationary strip member 161 is provided in a shape corresponding to the engaging groove D1 of the upper protective plate 131 and is seated in the engaging groove D1, And can be directly coupled to the upper protection plate 131 by the fixing plate 2. In this case, the auxiliary plate 165 may be omitted.

The fixing bolt 310 may be fixed to the upper surface of the fixing strip 161 by welding. In this case, the thread groove 161a described above can be omitted.

Referring to FIG. 11, the primary barrier 170 may form a concave shaped joining surface 170a at a peripheral portion corresponding to the position where the fixing bolts 310 are installed. The joint surface 170a is welded to the fixed strip member 161 around the fixing bolt 310 and the primary barriers 170 on both sides may be connected to each other around the fixing bolt 310. [

Referring to FIG. 12, after the installation of the fixing bolts 310 is completed, a welding rail R for welding the primary barrier 170 is installed. The welding rail R may be formed, for example, in the form of an H beam, and may form a coupling hole H3 to be engaged with the fixing bolt 310. [ Since the fixing bolts 310 are provided for each upper insulating board 130 according to the welding operation, the welding rails R may be installed in the horizontal or vertical direction. Thereafter, a welding apparatus (not shown) is installed to move on both sides of the welding rail R, and automatic welding is performed for the installation of the primary barrier 170 while moving the welding apparatus along the welding rail R can do.

At this time, the welding rail R using the fixing bolts 310 can be easily installed irrespective of the shape of the corrugation crossing portion of the primary barrier 170, so that the welding work for the primary barrier 170 is facilitated .

Further, after the welding operation is completed, the fixing bolt 310 can be easily removed, and the work efficiency can be improved.

The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

110: lower insulation board 111: lower protection board
112: lower insulation member 113: lower sub-panel
120: secondary barrier 130: upper insulation board
131: upper protection plate 132: upper insulation member
133: shock absorbing layer 134: upper auxiliary panel
135: connection board 136: connection board
137: connection insulating member 150: anchor plate
160, 161: strip member 170: primary barrier
210: Fixing piece 211: Stud bolt
310: Fixing bolt

Claims (9)

An upper insulation board interposed 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 plurality of strip members inserted into the coupling grooves formed in the upper protective plate,
And a fixing bolt for mounting the welding bar for welding the primary barrier welding is provided on at least one of the center portions of the strip members. The method according to claim 1,
Wherein the fixing strip member at the center of the upper protective plate provided at an intersecting position between the strip members sliding along the shrinking expansion of the primary barrier among the strip members is fixed to the coupling groove,
Wherein the fixing bolt is provided at a central portion of the fixing strip member. 3. The method of claim 2,
An auxiliary plate is disposed on both end portions of the fixed strip member in a state where the fixed strip member is seated in the coupling groove,
The coupling between the auxiliary plate and the upper protective plate is performed by the first coupling member fastened to the coupling hole of the auxiliary plate,
And the auxiliary plate and the strip member are coupled by the second binding member fastened to the thread hole of the auxiliary plate. 3. The method of claim 2,
Wherein the fixing strip member is provided in a shape corresponding to the coupling groove of the upper protection plate and is seated in the coupling groove, and both end portions are coupled to the upper protection plate by a coupling member. The method according to claim 2 or 4,
Wherein the fixing strip member has a screw groove formed at the central portion so that the fixing bolt is screwed. 3. The method of claim 2,
Wherein the fixing bolt includes a stud bolt and is welded to an upper surface of a central portion of the fixing strip member. 3. The method of claim 2,
Wherein the primary barrier has a concave shaped joint surface welded to the fixed strip member around the fixing bolt at a peripheral portion corresponding to a position where the fixing bolt is installed. The method according to claim 1,
Further comprising a lower insulation board disposed above the inner wall of the cargo hold,
Wherein the lower insulation panel includes a lower protection plate, a lower insulation member on the lower protection plate, and a lower auxiliary panel interposed between the secondary barrier and the lower insulation member, and a stud bolt is vertically fixed on a central portion of the lower auxiliary panel, Lt; / RTI &
Wherein the secondary barrier is disposed to cover a space formed between the lower heat insulating boards on both sides and is connected to another secondary barrier adjacent to the stud bolt and has a peripheral portion corresponding to a position where the stud bolt is installed, The structure of the cargo hold barriers with the joint surfaces joined by the original welding method. 8. The method of claim 7,
The lower heat-insulating board has a predetermined thickness and a square shape having the same width and the same length,
Wherein the upper insulating board is disposed on the lower insulating board on both sides and is disposed at an upper portion of the secondary barrier in such a manner that corner portions are coupled to the stud bolt,
Wherein a connection board is interposed in a space formed between the upper heat insulating boards so as to be disposed on the same plane as the upper heat insulating board.

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