KR101873776B1 - Combining unit of cargo barrier structure - Google Patents

Abstract

Disclosed is a coupling unit of a cargo barrier structure that is capable of effectively coping with the application of various forces like the generation of shrinkage displacement by a cryogenic fluid or the behavior of a ship body, thereby enhancing the performance of the carrier barrier structure. According to the present invention, the coupling unit of a cargo barrier structure includes: a base member disposed on top of the inner wall of a ship body; a first coupling bolt vertically fixed to the top of the base member; a first joint having a first flat portion coupled to the first coupling bolt and first support portions extended upward from both ends of the first flat portion; a second joint coupled between the first support portions by means of a second coupling bolt; a third joint having a second flat portion, second support portions extended downward from both ends of the second flat portion, and a third coupling bolt for coupling the second support portions and the second joint to cover the top of the second joint with the second flat portion; a fixing bolt vertically fixed to the top of the third joint; and a fastener fastened to the fixing bolt to pressurize a lower protection plate of a lower insulating board disposed between the inner wall of the ship body and a secondary barrier.

Description

{COMBINING UNIT OF CARGO BARRIER STRUCTURE}

The present invention relates to a coupling unit of a cargo hold barrier structure.

The barrier structure of a vessel cargo hold carrying a cryogenic fluid is typically a structure in which a primary barrier, an upper insulation board, a secondary barrier and a lower insulation board are sequentially combined. This is to prevent further leakage of the fluid in the secondary barrier if there is a small leakage of the cryogenic fluid in the primary barrier.

The process of installing a barrier in a cargo hold typically comprises fixing a plurality of lower heat-insulating boards on the inner wall of the hull, installing a secondary barrier on the lower heat-insulating board, and installing an upper insulating board and a primary barrier on the secondary barrier . At this time, in a state where the lower heat insulating board, the secondary barrier, and the upper heat insulating board are coupled to the inner wall of the hull adjacent to each other adjacent to each other, the space between the upper part of the main secondary barrier and the upper heat insulating board A secondary barrier and a connection board may be installed, and a primary barrier may be provided above the upper insulation board.

In such a cargo hold wall, the heat insulating member included in the upper insulating board and the lower insulating board is composed of a heat insulating material such as a foam, but a significant amount of shrinking displacement occurs at a cryogenic temperature condition due to a coefficient of thermal expansion (CTE) .

At this time, the stud bolt coupled with the inner wall of the hull and the lower heat insulating board may be bent when a contraction displacement occurs due to the cryogenic fluid or when various forces such as hull behavior are applied, which may weaken the barrier structure of the cargo hold. The buckling phenomenon of the stud bolt may be more prominent when a thermal contraction load is generated in the barrier structure provided at the corner of the cargo hold.

In this connection, please refer to Korean Patent Publication No. 10-2016-0033818 (published on Mar. 29, 2016).

Korean Patent Publication No. 10-2016-0033818 (published on Mar. 29, 2016)

An embodiment of the present invention is to provide a coupling unit of a cargo hold barriers structure capable of effectively enhancing the performance of a cargo hold barriers structure when shrinkage displacement occurs due to cryogenic fluid or various forces such as other hull behaviors are applied.

According to an aspect of the present invention, there is provided a hull structure comprising: a base member disposed on an inner wall of a hull; A first coupling bolt vertically fixed on the base member; A first joint including a first flat portion coupled to the first coupling bolt and a first support portion extending upward from both ends of the first flat portion; A second joint coupled between the first supports by a second coupling bolt; And a second support portion extending downward from both ends of the second flat portion and the second flat portion, and the second support portion is formed by the third engagement bolt to cover the upper portion of the second joint by the second flat portion, A third joint coupled with the second joint; A fixing bolt vertically fixed on the third joint; And a fastening portion which is fastened to the fixing bolt so as to press the lower protection plate of the lower heat insulation board disposed between the inner wall of the hull and the secondary barrier, wherein at least one of the first and third joints It is possible to provide a coupling unit of a cargo hold barriers structure in which coupling grooves are formed so as to penetrate through at least one of the first coupling bolts to the third coupling bolts so as to enable rotational displacement.

The first to third engagement bolts may form a plurality of stoppers protruding from the peripheral portion at regular intervals.

The engaging groove may define an insertion space into which the stopper is inserted, and the insertion space may be larger than the size of the stopper to enable the rotational displacement.

The first joint is formed with a first coupling groove having a shape penetrating in the Z-axis direction to the first flat portion coupled with the first coupling bolt, and the first coupling portion having the X- And the second joint is formed in a block shape, and a third coupling groove having a shape penetrating for coupling with the second coupling bolt is formed in the X-axis direction And a fourth joint groove having a shape penetrating for engagement with the third joint bolt is formed in the Y axis direction and the third joint is formed on the second support portion in the Y axis direction for engagement with the third joint bolt, A fifth engagement groove having a shape penetrating in the direction of the first engagement groove can be formed.

The coupling unit of the cargo hold barrier structure according to the embodiment of the present invention effectively improves the performance of the cargo hold barrier structure when shrinkage displacement occurs due to cryogenic fluid or various forces such as other hull behavior are applied.

1 is a cross-sectional view illustrating a structure in which a coupling unit is provided in a cargo hold barrier structure according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of the coupling unit of Figure 1;
Figure 3 is a perspective view of the coupling unit of Figure 2;
Figure 4 is a cross-sectional view showing a first coupling bolt included in the coupling unit of Figure 3 and a first joint coupled thereto.
Fig. 5 is a cross-sectional view of the first joint of Fig. 3 coupled with the second joint; Fig.
Figure 6 is a perspective view of a second joint coupled to the first joint of Figure 5;
Figure 7 is a perspective view of a third joint coupled to the second joint shown in Figure 3;
FIG. 8 is a cross-sectional view comparing the size of the coupling groove of the first joint and the second joint shown in FIG. 3 and the size of the coupling bolt including the stopper.

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.

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 primary barrier 101, an upper insulating board 110, And includes a barrier 102, a strip member 104, a lower heat insulating board 120, a fixing piece 130, a stud bolt 140, an impact absorbing layer 150, and a coupling unit 200.

The primary barrier 101 is a portion where the cryogenic fluid directly contacts, and can be made of a metal material such as stainless steel (SUS) or the like. Since the primary barrier 101 can be installed on the upper insulating board 110 in various known forms and methods, detailed description is omitted.

The upper insulation board 110 is provided between the primary barrier 101 and the secondary barrier 102 and the first auxiliary panel 111 and the first insulation member 112 and the first protection plate 113 are sequentially Stacked structure. Here, the first sub-panel 111 and the first protection plate 113 may be made of a material such as plywood. The first heat insulating member 112 may be made of a polyurethane foam (PUF), a reinforced polyurethane foam (R-PUF), or the like to protect the hull from the cryogenic fluid.

The secondary barrier 102 is disposed between the upper insulating board 110 and the lower insulating board 120 and may be composed of a composite sheet composed of a metal sheet and a fiber reinforced composite material.

The strip member 104 may be interposed between the upper insulating board 110 and the primary barrier 101. The strip member 104 is disposed in a groove-shaped engagement region formed in the first protection plate 113 of the upper heat insulation board 110 so as to be movable in accordance with contraction expansion of the primary barrier 101. The primary barrier 101 is welded to the upper portion of the strip member 104 and the strip member 104 moves according to the movement of the primary barrier 101 which expands and contracts due to thermal stress. This can alleviate the thermal stress and improve the durability of the cargo barrier walls. As another example, the primary barrier 101 may be installed in such a manner as to press the upper portion of the strip member 104 such that the strip member 104 moves together with the contraction expansion of the primary barrier 101. Such a strip member 104 may be made of, for example, stainless steel or the like.

The lower insulation board 120 is disposed between the inner wall 103 of the ship and the secondary barrier 102 and the second protection plate 121 and the second insulation member 122 and the second sub panel 123 are sequentially stacked . Here, the second protection plate 121 and the second sub-panel 123 may be made of a material such as plywood. The second heat insulating member 122 is made of a polyurethane foam (PUF), a reinforced polyurethane foam (R-PUF) or the like to protect the hull from a fluid at a cryogenic temperature. A filling member 106 such as a glass wool or the like may be inserted and filled in the space between the lower heat insulating members 120 to maintain the heat insulating performance.

The fixing piece 130 is disposed at a depression portion of the second sub-panel 123. [ The fixing member 130 may be a circular plate having a groove to which the stud bolt 140 is coupled and may be fixed to a depression portion of the second sub-panel 123 by a coupling member including a rivet R or the like. .

 The stud bolt 140 is coupled to the first sub-panel 111 and the fixing piece 130. The stud bolt 140 is coupled to the washer 142 and the nut 144 tightened to apply a force to the washer 142 so that the mechanical coupling between the upper insulating board 110 and the lower insulating member 120 can be performed have.

The shock absorbing layer 150 may be provided between the first sub-panel 111 and the secondary barrier 102. The shock absorbing layer 150 can protect the cargo hold barrier from sloshing shock caused by liquefied gas stored in the cargo hold. The shock absorbing layer 150 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 thereto, and the impact absorbing layer 150 can be made of various materials that can protect the cargo barrier from the sloshing shock caused by the liquefied gas stored inside the cargo hold.

The coupling unit 200 allows coupling between the lower heat insulating board 120 and the hull inner wall 103.

2 and 3, the coupling unit 200 includes a base member 201 disposed on the inner wall 103 of the hull, a first coupling bolt B1 vertically fixed on the base member 201, A first flat portion 212 coupled to the first coupling bolt B1 and a first support portion 213a and 213b extending upward from both ends of the first flat portion 212, A second joint 220 coupled between the first support portions 213a and 213b by a second coupling bolt B2 and a second joint 220 coupled between the first and second support portions 213a and 213b at both ends of the second flat portion 232 and the second flat portion 232, And the second support portions 233a and 233b are formed by the third engagement bolts B3 so as to cover the upper portion of the second joint 220 by the second flat portions 232. The second support portions 233a, 233b are coupled to the front and rear surfaces of the second joint 220, a fixing bolt 240 vertically fixed on the third joint 230, a hull inner wall 103 and a secondary barrier 102 of the lower insulation board 120, And a fastening part 250 including a washer 251 and a nut 252 fastened to the fastening bolt 240 to press the hoist plate 121.

Here, the first to third engagement bolts (B1 to B3) may form a plurality of stoppers (S) protruding from the peripheral portion at regular intervals. 2 and 4 show the stopper S of the first coupling bolt B1 but the second coupling bolt B2 and the third coupling bolt B3 also form the same stopper S can do.

In addition, at least one of the first joint 210 to the third joint 230 may have a first coupling bolt B1 and a second coupling bolt B2 so that the first and second joints 210 to 230 can be rotationally displaced when contraction displacement occurs due to cryogenic fluid, (H1 to H5, see Figs. 4, 6, and 7) having a shape penetrating through at least one of the first to third coupling bolts B3 to B3.

The coupling grooves H1 to H5 of the first joint 210 to the third joint 230 have the same shape as the cross sectional shapes of the first coupling bolt B1 to the third coupling bolt B3 having the stopper S But the size can be made larger. That is, the maximum diameters of the coupling grooves H1 to H5 of the first joint 210 to the third joint 230 are set such that the first joint 210 to the third joint 230 can be rotationally displaced Is larger than the maximum diameter of the first to third engagement bolts (B1 to B3) including the stopper (S). 8) of the coupling grooves H1 to H5 of the first joint 210 to the third joint 230 into which the stopper S is inserted are inserted into the first joint 210 to the third Is larger than the size of the stopper (S) so that the joint (230) can be rotationally displaced.

Hereinafter, each component will be described in detail.

The base member 201 may be provided in a flat plate shape and disposed above the inner wall 103 of the hull.

The first engaging bolt B1 may be vertically fixed in a state where a lower portion of the first engaging bolt B1 is inserted into the groove 201a at the upper end of the base member 201 so that the stopper S is exposed. The exposed portion of the first coupling bolt B1 is engaged with the first flat portion 212 of the first joint 210 and the first coupling bolt 212 protruded above the first flat portion 212 of the first joint 210, A washer 204 and a nut 203 may be coupled to the upper portion of the main body B1.

’형상으로 마련될 수 있으며, 제1결합볼트(B1)에 결합되는 제1평탄부(212) 및 제1평탄부(212) 양단으로부터 상방향으로 연장 형성된 제1지지부(213a,213b)를 포함한다. 제1조인트(210)는 제1결합볼트(B1)와 결합되는 제1평탄부(212)에 Z축 방향으로 관통된 형상의 제1결합홈(H1)을 형성하고, 제2결합볼트(B2)가 결합되는 양측 제1지지부(213a,213b)에 X축 방향으로 관통된 형상의 제2결합홈(H2)을 형성한다. Referring to FIGS. 3 and 4, the first joint 210 '

And includes a first flat portion 212 coupled to the first coupling bolt B1 and first support portions 213a and 213b extending upward from both ends of the first flat portion 212 do. The first joint 210 forms a first coupling groove H1 having a shape penetrating in the Z axis direction to the first flat portion 212 coupled with the first coupling bolt B1 and the second coupling bolt B2 The second coupling grooves H2 having a shape penetrating in the X-axis direction are formed on the first side support portions 213a and 213b to which the first side support portions 213a and 213b are coupled.

3, 5 and 6, the second joint 220 may be provided in a square block shape. The second joint 220 has a third engagement groove H3 formed in the shape of a through-hole in the X-axis direction on the side surface thereof for engagement with the second engagement bolt B2, And a fourth engagement groove H4 of a penetrating shape is formed in the Y axis direction of the front and rear surfaces. The third engagement groove H3 may be positioned below the fourth engagement groove H4.

A nut 205 is fastened to the end of the second fastening bolt B2 having the second fastening 220 coupled between the first supporting portions 213a and 213b of the first fastening 210 and the third fastening bolt B3), a nut may be fastened to the end side.

’형상으로 마련될 수 있으며, 양측면에 제3결합볼트(B3)와의 결합을 위해 제2지지부(233a,233b)에 관통된 형상의 제5결합홈(H5)을 Y축 방향으로 형성한다.Referring to FIGS. 3 and 7, the third joint 230 '

And a fifth coupling groove H5 having a shape penetrating through the second supporting portions 233a and 233b is formed in the Y axis direction for coupling with the third coupling bolts B3 on both sides.

As described above, the maximum diameters of the coupling grooves H1 to H5 of the first joint 210 to the third joint 230 are determined by the rotation of the first joint 210 to the third joint 230 when a force is applied, May be formed larger than the maximum diameter of the first to third engagement bolts (B1 to B3) including the stopper (S) so as to be displaceable.

8, the maximum diameter D1 of the coupling grooves H4 and H5 of the second joint 220 and the third joint 230 may be greater than the maximum diameter D1 of the third coupling bolt (not shown) including the stopper S B3) of the first and second electrodes (12, 13).

That is, the insertion space S1 of the coupling grooves H4 and H5 of the second joint 220 and the third joint 230 into which the stopper S is inserted is inserted into the second joint 220 and the third joint 230, So that the rotational displacement of the stopper S can be performed.

The coupling grooves H1 to H5 of the first joint 210 to the third joint 230 are formed to have the same cross sectional shape as the first coupling bolt B1 to the third coupling bolt B3 having the stopper S They have the same shape, but their sizes can be made larger.

This can effectively respond to various forces such as shrinkage displacement caused by cryogenic fluid or other hull behavior, thereby enhancing the performance of the cargo hold barrier structure.

Specifically, as shown in FIG. 3, when the liquefied gas is subjected to heat shrinkage and hull load, the cargo hold receives a horizontal load of Fx and Fy and a vertical load of Fz. At this time, when the coupling unit 200 of the present invention receives the Fx load, the third joint 230 is rotationally displaced until it comes into contact with the stopper S of the third coupling bolt B3. When the Fy load is applied, the second joint 220 is rotationally displaced until it comes into contact with the stopper S of the second engagement bolt B2. When the Fz load is applied, the first joint 210 is rotationally displaced until it comes into contact with the stopper S of the first coupling bolt B1. The rotational displacement due to such a load can be made to be related to each other in a complex manner.

Thus, by allowing the behavior of the heat insulating board constituting the cargo hold barrier structure to some extent, it is possible to prevent an excessive load from acting on the fastening portion such as the coupling unit 200.

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.

101: primary barrier 102: secondary barrier
103: Hull inner wall 104: Strip member
110: upper insulating board 111: first auxiliary panel
112: first heat insulating member 113: first shield plate
120: lower insulation board 121: second protection board
122: second heat insulating member 123: second auxiliary panel
130: Fixing piece 140: Stud bolt
201: base member 210: first joint
220: second joint 230: third joint
240: fixing bolt 250: fastening part
B1 to B3: Coupling bolts H1 to H5: Coupling groove
S: Stopper S1: Insertion space

Claims (4)

A base member disposed on the inner wall of the hull;
A first coupling bolt vertically fixed on the base member;
A first joint including a first flat portion coupled to the first coupling bolt and a first support portion extending upward from both ends of the first flat portion;
A second joint coupled between the first supports by a second coupling bolt;
And a second support portion extending downward from both ends of the second flat portion and the second flat portion, and the second support portion is formed by the third engagement bolt to cover the upper portion of the second joint by the second flat portion, A third joint coupled with the second joint;
A fixing bolt vertically fixed on the third joint; And
And a fastening portion fastened to the fixing bolt to press the lower protection plate of the lower heat insulation board disposed between the inner wall of the hull and the secondary barrier,
At least one of the first joint and the third joint forms a coupling groove having a shape penetrating through at least one of the first coupling bolt and the third coupling bolt so as to be rotatable when a force is applied thereto Combination unit of a cargo hold barrier structure. The method according to claim 1,
And the plurality of stoppers protruding from the first to third engaging bolts are formed at peripheral portions of the engaging bolts. 3. The method of claim 2,
Wherein the engaging groove defines an insertion space into which the stopper is inserted, and the insertion space is larger than the size of the stopper so as to allow the rotational displacement. The method of claim 3,
The first joint is formed with a first coupling groove having a shape penetrating in the Z-axis direction to the first flat portion coupled with the first coupling bolt, and the first coupling portion having the X- And a second coupling groove having a shape penetrating in a direction of the first coupling groove,
The second joint is formed in a block shape, and a third coupling groove having a shape penetrating for coupling with the second coupling bolt is formed in the X axis direction, and a through-hole shape for coupling with the third coupling bolt The fourth engaging groove of the second engaging portion is formed in the Y axis direction,
And the third joint has a fifth coupling groove formed in the second support portion in a Y-axis direction for coupling with the third coupling bolt.

Images