KR20240033709A - Cargo barrier structure, and method for installing thereof - Google Patents

Abstract

A cargo hold barrier structure and its installation method are disclosed. The cargo hold barrier structure according to an embodiment of the present invention includes a first lower insulation board including a lower protection plate disposed on the upper part of the hull, a lower insulation member disposed on the lower protection plate, and a lower auxiliary panel disposed on the lower insulation member. Second lower insulation board; And it is installed across the first lower insulation board and the second lower insulation board so that the space between the first lower insulation board and the second lower insulation board is separated from the hull, and the lower protective plate of the first lower insulation board and the second lower insulation board. It includes a heat transfer prevention film installed at the bottom so that both upper surfaces are in close contact.

Description

Cargo hold barrier structure and its installation method {CARGO BARRIER STRUCTURE, AND METHOD FOR INSTALLING THEREOF}

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

The lower insulation board of the cargo hold of a ship storing cryogenic fluid (eg, liquefied natural gas (LNG)) is installed at regular intervals on the upper part of the inner wall of the hull. At this time, an insulation member such as glass wool may be placed in the space between the lower insulation boards to maintain insulation performance.

Specifically, a lower insulation board is placed under the secondary barrier of the LNG cargo hold, and the lower insulation board is attached to the inner wall of the hull with mastic to distribute the load. The lower insulation board has an insulation function to block heat inflow by LNG, a cryogenic cargo, and is designed to withstand the hydrostatic pressure and fluid force of LNG. For this purpose, the lower insulation board may be composed of plywood glued to the upper and lower parts with relatively high density polyurethane foam as the center.

A plurality of lower insulation boards are arranged at set intervals and fixed to the inner wall of the hull with mastic and stud bolts, etc., and the spacing (space) between adjacent lower insulation boards is variable within a certain range.

In order to insulate such a variable space, glass wool is placed between the lower insulation boards as an interference fit.

However, unlike construction conditions at room temperature, when LNG cargo is stored, the lower insulation board and the glass wool each shrink due to a rapid decrease in temperature, which may cause a gap in the space where the glass wool is inserted, and convection currents occur within the gap to transfer heat. can promote.

As a result, there is a problem that may cause a local temperature drop problem in the hull.

An embodiment of the present invention seeks to provide a cargo hold barrier structure and a method of installing the same that can block convection due to heat transfer while cryogenic fluid is stored in the cargo hold.

According to one aspect of the present invention, each first lower insulation board and 2Lower insulation board; And it is installed across the first lower insulation board and the second lower insulation board so that the space between the first lower insulation board and the second lower insulation board is separated from the hull, and the first lower insulation board and the second lower insulation board are installed across the first lower insulation board and the second lower insulation board. A cargo hold barrier structure including a heat transfer prevention film installed at the bottom of the lower protective plate of the board so that both upper surfaces are in close contact may be provided.

The heat transfer prevention film may be fixed to the bottom of the lower protective plate by adhesive or mechanical fastening on only one of both sides.

The heat transfer prevention film is configured such that one side of the heat transfer prevention film is fixed to the bottom of the lower protective plate of the first lower insulation board, and the lower protective plate of the first lower insulation board is placed on the other side. 2It can be prepared as a flat plate to be used to adjust the level of the lower insulation board.

It may further include glass wool disposed in the space between the first lower insulation board and the second lower insulation board.

The heat transfer prevention film may have a through hole so that the inert gas required to inspect the health of the secondary barrier can be smoothly injected and diffused into the space below the secondary barrier.

According to another aspect of the present invention, disposing the first lower insulation board on the inner wall of the hull; Fixing one upper side of the heat transfer prevention film to the bottom of the lower protective plate of the first lower insulation board; Installing the second lower insulation board on the other upper side of the heat transfer prevention film so that it is aligned with the first lower insulation board while adjusting the level using the heat transfer prevention film fixed to the bottom of the first lower insulation board; And a method of installing a cargo hold barrier structure can be provided, including the step of inserting glass wool into the space between the first lower insulation board and the second lower insulation board.

The cargo hold barrier structure and its installation method according to an embodiment of the present invention can block the occurrence of convection due to heat transfer while cryogenic fluid is stored in the cargo hold.

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

Figure 1 shows a cargo hold barrier structure according to an embodiment of the present invention.
Figure 2 is an enlarged view of the heat transfer prevention film of the barrier structure shown in Figure 1.
Figures 3 and 4 show the installation process of the barrier structure shown in Figure 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples so that the idea of the present invention can be sufficiently conveyed to those skilled in the art. The present invention is not limited to the embodiments described below and 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 in the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Like reference numerals refer to like elements throughout the specification.

Figure 1 shows a cargo hold barrier structure according to an embodiment of the present invention, and Figure 2 is an enlarged view of the heat transfer prevention film among the barrier structures shown in Figure 1.

Referring to Figure 1, the barrier structure 100 of a cargo hold storing cryogenic fluid (e.g., liquefied natural gas (LNG)) according to an embodiment of the present invention includes a lower protection plate 111 disposed on the upper part of the hull 12, and , each of the first lower insulation board (110a) and the second lower insulation including the lower insulation member 112 disposed on the lower protection plate 111 and the lower auxiliary panel 113 disposed on the lower insulation member 112. The first lower insulation board (110a) and the second lower insulation board (110a) are insulated so that the space (S) between the board (110b) and the first lower insulation board (110a) and the second lower insulation board (110b) is separated from the hull 12. It is installed across the board 110b, and includes a heat transfer prevention film 120 installed so that both upper surfaces are in close contact with the bottom of the lower protection plate 111 of the first lower insulation board 110a and the second lower insulation board 110b.

Here, the heat transfer prevention film 120 may be fixed to the bottom of the lower protection plate 111 of either the first lower insulation board 110a or the second lower insulation board 110b by adhesive or mechanical fastening on only one side. there is.

In addition, the heat transfer prevention film 120 is fixed on one side to the bottom of the lower protection plate 111 of the first lower insulation board 110a, and is attached to the lower protection plate 111 of the first lower insulation board 110a on the other side. It can be prepared as a flat plate so that it can be used to adjust the level difference between the first lower insulation board 110a and the second lower insulation board 110b.

Additionally, the cargo hold barrier structure 100 may include glass wool 125 disposed in the space S between the first lower insulation board 110a and the second lower insulation board 110b.

Hereinafter, the cargo hold barrier structure 100 according to an embodiment of the present invention will be described in detail.

The lower insulation boards (110a, 110b) are arranged side by side at a set interval on the upper part of the inner wall of the hull (12), and are manufactured in a stacked form with the lower protection plate (111), lower insulation member (112), and lower auxiliary panel (113). You can.

The lower surfaces of the lower insulation boards 110a and 110b may be attached to the inner wall of the hull 12 using mastic 14.

The above-mentioned lower protection plate 111 is fixed to the inner wall of the hull 12 and may be made of, for example, plywood.

The lower insulation member 112 is disposed on the upper part of the lower protection plate 111 and is made of polyurethane foam (PUF), reinforced polyurethane foam (RPUF), etc. to protect the hull 12 from cryogenic fluid. can protect. The lower insulation member 112 may be bonded to the upper part of the lower protective plate 111 using an adhesive (eg, glue, etc.).

The lower auxiliary panel 113 may be made of plywood and is placed on the upper part of the lower insulation member 112.

The heat transfer prevention film 120 insulates the first lower insulation board 110a and the second lower insulation board so that the space S between the first lower insulation board 110a and the second lower insulation board 110b is separated from the hull 12. It is installed across the board 110b so that both upper surfaces are in close contact with the bottom of the lower protection plate 111 of the first lower insulation board 110a and the second lower insulation board 110b.

The heat transfer prevention film 120 may be made of plywood and adhered, or may be made of metal and fixed by mechanical fastening.

The heat transfer prevention film 120 may be fixed to the bottom of the lower protection plate 111 of either the first lower insulation board 110a or the second lower insulation board 110b by adhesive or mechanical fastening on only one side. For example, one side of the heat transfer prevention film 120 is fixed to the bottom of the lower protective plate 111 of the first lower insulation board 110a by adhesive, and then the other side is fixed to the lower protective plate 111 of the second lower insulation board 110b. (111) It can be placed in close contact with the bottom.

This heat transfer prevention film 120 can block convection due to heat transfer while cryogenic fluid is stored in the cargo hold.

In addition, the heat transfer prevention film 120 is fixed on one side to the bottom of the lower protection plate 111 of the first lower insulation board 110a, and is attached to the lower protection plate 111 of the first lower insulation board 110a on the other side. This can be used to adjust the level difference between the first lower insulation board 110a and the second lower insulation board 110b. To adjust the level difference between the first lower insulation board 110a and the second lower insulation board 110b, the heat transfer prevention film 120 may be provided as a flat plate.

In addition, since only one side of the heat transfer prevention film 120 is fixed to the insulation board, it can effectively respond to thermal contraction and expansion of the insulation board.

In addition, as shown in (a) and (b) of FIG. 2, the heat transfer prevention film 120 smoothly injects the inert gas necessary for inspecting the health of the secondary barrier 130 into the space below the secondary barrier 130. And to enable diffusion, for example, a through slit or a circular hole (H) may be formed.

The glass wool 125 is disposed in the space (S) between the first lower insulation board (110a) and the second lower insulation board (110b), and the first lower insulation board (110a) and the second lower insulation board (110b) A secondary barrier 130 is placed at the top. In another example, in addition to the glass wool 125, various known insulation members may be disposed in the space S between the first lower insulation board 110a and the second lower insulation board 110b.

The secondary barrier 130 is disposed on the first lower insulation board 110a and the second lower insulation board 110b. The secondary barrier 130 can effectively respond to thermal stress caused by cryogenic fluid by, for example, forming a wrinkled portion (not shown) with a curved shape in the downward direction to expand and contract.

Figures 3 and 4 show the installation process of the barrier structure shown in Figure 1.

As shown in FIG. 3, first, the first lower insulation board 110a is fixed on the inner wall of the hull 12 with mastic 14.

Next, one upper side of the heat transfer prevention film 120 is fixed to the bottom of the lower protection plate 111 of the first lower insulation board 110a. At this time, the heat transfer prevention film 120 may be fixed to the first lower insulation board 110a by adhesive or mechanical fastening.

As shown in FIG. 4, the second lower insulation board 110b is fixed on the inner wall of the hull 12 by mastic 14, and is fixed to the bottom of the lower protection plate 111 of the first lower insulation board 110a. The second lower insulation board (110b) is installed on the other upper side of the heat transfer prevention film (120) so that it is arranged side by side with the first lower insulation board (110a) while adjusting the level using the heat transfer prevention film (120).

Through this, the space S between the first lower insulation board 110a and the second lower insulation board 110b and the hull 12 can be blocked by the heat transfer prevention film 120.

In addition, the heat transfer prevention film 120 can prevent convection due to cryogenic fluid.

In addition, when installing a barrier, it is possible to adjust the level difference between the lower insulation boards by using the heat transfer prevention film 120, so more effective barrier installation can be achieved.

Afterwards, the glass wool 125 (see FIG. 1) is inserted into the space S between the first lower insulation board 110a and the second lower insulation board 110b, and the first lower insulation board 110a and the second lower insulation board 110b are inserted into the space S between the first lower insulation board 110a and the second lower insulation board 110b. A secondary barrier (130, see Figure 1) is placed on the lower insulation board (110b).

In the above, specific embodiments are shown and described. However, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various changes without departing from the gist of the technical idea of the invention as set forth in the claims below. You will be able to.

110a: first lower insulation board 110b: second lower insulation board
111: Lower protection plate 112: Lower insulation member
113: Lower auxiliary panel 120: Heat transfer prevention film
125: Glass wool 130: Secondary barrier

Claims (6)

A first lower insulation board and a second lower insulation board each including a lower protection plate disposed on the upper part of the hull, a lower insulation member disposed on the lower protection plate, and a lower auxiliary panel disposed on the lower insulation member; and
It is installed across the first lower insulation board and the second lower insulation board so that the space between the first lower insulation board and the second lower insulation board is separated from the hull, and the first lower insulation board and the second lower insulation board A cargo hold barrier structure comprising a heat transfer prevention film installed at the bottom of the lower protective plate so that both upper surfaces are in close contact. According to paragraph 1,
A cargo hold barrier structure in which the heat transfer prevention film is fixed to the bottom of the lower protection plate of either the first lower insulation board or the second lower insulation board by adhesive or mechanical fastening on only one side. According to paragraph 1,
The heat transfer prevention film is
With one side fixed to the bottom of the lower protection plate of the first lower insulation board, the lower protection plate of the first lower insulation board is placed on the other side to adjust the level difference between the first lower insulation board and the second lower insulation board. To be used, a cargo hold barrier structure prepared as a flat plate. According to paragraph 1,
A cargo hold barrier structure further comprising glass wool disposed in the space between the first lower insulation board and the second lower insulation board. According to paragraph 1,
The heat transfer prevention film is a cargo hold barrier structure in which a through hole is formed to allow smooth injection and diffusion of inert gas required for health inspection of the secondary barrier into the space below the secondary barrier. In the method of installing a cargo hold barrier structure according to any one of claims 1 to 5,
Placing the first lower insulation board on the inner wall of the hull;
Fixing one upper side of the heat transfer prevention film to the bottom of the lower protective plate of the first lower insulation board;
Installing the second lower insulation board on the other upper side of the heat transfer prevention film so that it is aligned with the first lower insulation board while adjusting the level using the heat transfer prevention film fixed to the bottom of the first lower insulation board; and
A cargo hold barrier structure installation method comprising the step of inserting glass wool into the space between the first lower insulation board and the second lower insulation board.

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