KR20190076274A - Method of finishing cargo insulation system for liquefied natural gas carrier, temporary finishing construction structure and finishing construction structure - Google Patents

Abstract

The present invention relates to a construction method for finishing an insulation system of a membrane-type cargo hold in a liquefied natural gas carrier, wherein the cargo hold has a primary and a secondary barrier to both of which a metallic membrane is applied for enhancing performance of the cargo hold, and both of which are composed of a corrugated membrane, to ensure a noble type work passage design and finishing method, adopts a method of minimally cutting a membrane and an insulation panel installed near the work passage of the cargo hold to perform a finishing construction, and adopts a method of forming the primary and secondary barrier by directly welding a straight bar type temporary membrane, thereby being capable of efficiently performing an airtight test and a finishing process of the primary and the secondary barrier, and simplifying a finishing process and remarkably reducing a construction period.

Description

Technical Field [0001] The present invention relates to a method for finishing a cargo hold insulation system of a membrane type liquefied natural gas cargo ship, a temporary hold construction structure for a cargo hold, and a finishing construction structure for a finishing construction structure,

The present invention relates to a method for finishing a cargo hold insulation system for a membrane-type liquefied natural gas carrier, a temporary hold construction for a cargo hold, and a finishing construction structure, and more particularly to a method for cutting a membrane and an insulation panel near a work channel of a cargo hold, A method of finishing a cargo hold insulation system of a membrane-type liquefied natural gas carrier capable of effectively performing a tightness test and a finishing process of primary and secondary barriers by adopting a method of finishing a cargo hold and a finishing construction, .

Generally, liquefied gas is a liquid made by cooling or compressing gas, and consumption of liquefied gas such as LNG (Liquefied Natural Gas) or LPG (Liquefied Petroleum Gas) is rapidly increasing worldwide.

Liquefied natural gas, which is an example of liquefied gas, is a colorless transparent cryogenic liquid that reduces methane-based natural gas to -162 ° C and reduces its volume by one-sixth. Efficient transportation methods have been examined that can be mass-shipped from the production base to the destination of the request site. As part of this effort, a liquefied natural gas transport vessel capable of transporting large volumes of liquefied natural gas to sea was developed.

The liquefied natural gas transport vessel must have a cargo that can store and store the liquefied natural gas liquefied at a cryogenic temperature. Such a cargo hold of a liquefied natural gas transportation vessel can be classified into a self-supporting type and a membrane type depending on its structure. Among them, Korean Patent Laid-Open Publication No. 10-2012-0013233 Discloses a liquefied natural gas storage tank and a manufacturing method thereof.

The membrane type liquefied natural gas carrier cargo holds should have a sufficient working passage considering the size of the insulation panel, the work robot and the moving space of the operator, and a finishing method should be secured in the finishing process for completing all cargo holds.

In addition, a process plan should be accumulated so that the airtightness test of the primary and secondary barriers and the installation of the insulation panel can be performed at the same time.

Currently, industry is trying to apply metal membranes to both primary and secondary barriers to improve cargo hold performance. In the development of cargo hold of corrugated membranes for both primary and secondary barriers, a new type of work channel design And deadlines are essential.

Korean Patent Publication No. 10-2012-0013233

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a metal membrane which is applied to both primary and secondary barriers in order to improve the heat insulating performance of a cargo hold, In barrier cargo holds, it is essential to design a new type of work channel and to establish a finishing method. In this method, the membrane and the insulation panels installed near the work channel of the cargo hold are cut to a minimum and the finish construction is adopted. By adopting the method of direct welding temporary membrane in the form of straight bar, it is possible to perform the airtightness test and finishing process of the primary and secondary barriers efficiently, simple finishing process is possible, Deadline for holding a membrane-type liquefied natural gas carrier in a cargo hold To provide a method, a temporary hold closed construction structures, and it is an object of closed construction structure.

In order to accomplish the above object, the present invention provides a method for finishing a cargo hold window of a membrane-type LNG carrier insulation system for finishing a work channel of a cargo hold, the method comprising the steps of temporarily providing a temporary insulation panel and a temporary barrier around the work channel A secondary temporary closing process to close and test the airtight test; A demolishing step of demolishing the temporary adiabatic panel and the temporary barriers temporarily installed in the one temporary finishing step; And a cargo hold complete closing process for closing the work passage with a closed inner hull and installing an insulation panel and a barrier to finish the installation.

Wherein the one-time temporary finishing step comprises the steps of: providing an additional thermal protector on top of the secondary insulation panel installed on the inner hull; Installing a temporary secondary insulation panel on the inner hull at a same level adjacent to the secondary insulation panel; Wherein a secondary metal sheet is provided on the upper surface of the secondary insulation panel and the temporary secondary insulation panel and a temporary secondary barrier is sealed on the side surface of the temporary insulation panel, welding an upper end of the temporary secondary barrier to the secondary metal sheet to seal the secondary layer; Testing the airtightness of the secondary layer; Providing an additional anchor strip on top of a primary insulation panel installed on top of the secondary insulation panel; Installing a temporary primary insulation panel on top of the secondary insulation panel and the temporary insulation panel at the same height as the primary insulation panel; Providing a primary metal sheet on top of the primary insulation panel and the temporary insulation panel; A first temporary primary barrier is welded to a side of the temporary primary insulation panel, a lower end of the first temporary primary barrier is welded to a lower end of the temporary secondary barrier, and an upper end of the first temporary primary barrier is welded ; Sealing the second temporary primary barrier at a location adjacent the primary barrier and the primary metal sheet; Sealing the first layer by welding a third temporary primary barrier between the first temporary primary barrier and the second temporary primary barrier; And testing the airtightness of the primary layer; .

In this step, the upper end of the temporary secondary barrier protrudes upward from the secondary metal sheet, and in the step, the temporary primary insulation panel is supported on the protruding portion to install the temporary primary insulation panel.

The thermal protector is fixed to the top plywood of the secondary insulation panel with a staple.

The primary and secondary metal sheets are made of either an invar or a saucer material and are fixed with screws.

The anchor strip is additionally applied to the end of the primary insulation panel.

Wherein the demolishing step comprises cutting and removing a welded portion of the first temporary primary wall, the second temporary primary wall, and the third temporary primary wall; Removing the temporary primary insulation panel; Cutting the welded portion of the temporary secondary barrier and removing it; Removing a portion of the secondary metal sheet; And removing the temporary secondary insulation panel. .

Wherein the cargo hold full closure comprises: welding the finished inner hull to close the work passage; Welding a stud bolt to the closed inner hull; Installing and fixing the secondary insulation panel using the stud bolt; Sealing the secondary barrier on the upper surface of the secondary insulation panel; Installing and fixing a secondary insulation panel on the upper side of the secondary barrier; And sealing the primary barrier on the upper surface of the secondary insulation panel to complete the cargo window; .

As described above, in an LNG cargo hold having a corrugation secondary barrier, the area that can be cut for a work passage is limited in the structure. In the present invention, the membrane installed near the work passage of the cargo hold By adopting a method of finishing the insulation panel by cutting the insulation panel to the minimum, the airtightness test and the finishing process of the primary and secondary barriers can be efficiently performed.

Also, in a membrane-type cargo hold, typically a primary and a secondary barrier metal, finishing is required at the end of the corrugation for finishing the airtight test. In the present invention, both the primary and secondary barriers have a straight bar ) Type temporary membrane is directly welded, a simple finishing process can be performed, and the construction period can be remarkably shortened.

Further, in the present invention, since the processing operation can be performed with the temporary adiabatic panel of a simple shape and the temporary barrier, there is an advantage that the manufacture of the cargo hold is easy and the production cost can be reduced.

Further, since the additional thermal protector is provided on the upper part of the secondary insulation panel and the additional anchor strip is provided on the upper part of the primary insulation panel, it is possible to prevent damages and damage of the insulation panel in the process of cutting the temporary barrier in the demolition process in advance have.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a secondary insulation panel and a temporary secondary insulation panel installed around a work channel in a cargo hold insulation system of a membrane type liquefied natural gas carrier of the present invention; Fig.
2 is a sectional view taken along the line AA in Fig. 1
Fig. 3 is a perspective view showing the secondary insulation panel of Fig.
Fig. 4 shows the temporary secondary insulation panel of Fig. 1, wherein (a) shows a heat insulating panel installed at a corner portion, (b) shows a heat insulating panel
5 is a plan view showing a temporary secondary insulation panel and a temporary secondary barrier
Fig. 6 is an enlarged view of the main part of Fig. 5
7 is a sectional view taken along line BB of Fig. 5
8 shows a temporary secondary barrier of 7, wherein (a) is a barrier provided at a corner portion, (b) is a barrier provided at a flat portion,
9 is a view showing that both ends of the temporary secondary barrier of Fig. 7 are welded together
10 is a plan view showing a temporary secondary barrier and a primary insulation panel
11 is a sectional view taken along the line CC of Fig. 10
12 is a perspective view showing the primary insulation panel of Fig.
Fig. 13 shows a temporary primary insulation panel, in which (a) is a panel provided at a corner portion, (b) is a panel provided at a flat portion
14 is a plan view showing a primary primary barrier and a primary barrier
15 is an enlarged view of the main part of Fig. 14
Fig. 16 is a cross-sectional view taken along the line DD of Fig. 14, which shows the temporary hold construction structure of the present invention
17 is a plan view for explaining a temporary temporary finishing step
18 is a sectional view taken along line EE of Fig. 17;
19 is a sectional view taken along the line E'-E 'in Fig. 17
20A to 20E are cross-sectional flow charts for explaining the demolishing process of the present invention
Fig. 21 is a partially enlarged view
FIG. 22 is a view showing a finished inner hull and stud bolt welding in the cargo hold complete closing process of the present invention, wherein (a) is a plan view of the cargo hold, and (b)
FIG. 23 is a view showing the installation of a secondary insulation panel on a finished inner hull in the cargo hold complete closing process of the present invention, wherein (a) is a plan view of a cargo hold, and (b)
(A) is a plan view of a cargo hold, and (b) is a perspective view of a DD line cutting perspective view (a) of FIG.
FIG. 25 is a view showing the installation of a primary insulation panel on a secondary barrier in the cargo hold complete finishing process of the present invention, wherein (a) is a plan view of the cargo hold, and (b)
FIG. 26 is a view showing a finishing construction structure showing a primary barrier installation on a primary insulation panel in a cargo hold complete finishing process according to the present invention, wherein (a) is a plan view of a cargo hold, and (b)
27 is a block diagram for explaining the entire method for finishing the hold-type insulation system of the membrane type liquefied natural gas carrier of the present invention
28 is a block diagram showing a temporary temporary finishing process in the method of finishing a cargo hold insulation system of a membrane type liquefied natural gas carrier of the present invention
29 is a block diagram showing a demolition process in a method of finishing a holding type liquefied natural gas carrier of the present invention,
30 is a block diagram showing a cargo hold complete closing process in the method for finishing the cargo hold insulation system of the membrane type liquefied natural gas carrier of the present invention

Hereinafter, with reference to the accompanying drawings, a description will be made of a method for finishing a cargo hold insulation system of a membrane type liquefied natural gas carrier of the present invention, a temporary hold construction for a cargo hold, and a finishing construction structure.

In order to improve the heat insulating performance of a cargo hold, a metal membrane is applied to both the primary and secondary walls. However, a cargo hold having both primary and secondary walls formed of corrugated membranes has a new type It is essential to design a work path and establish a finishing plan.

Fig. 27 is a block diagram illustrating the entire method of finishing the hold-type insulation system of a membrane-type liquefied natural gas carrier.

The present invention relates to a method for finishing a cargo hold window of a membrane type LNG carrier insulation system for finishing a work channel of a cargo hold, as shown in FIG. 27, in which a temporary adiabatic panel and a temporary barrier are temporarily closed around the work channel A secondary temporary finishing step (S 100) of testing the airtightness; A demolishing process (S 200) for demolishing the temporary adiabatic panel and the temporary barrier temporarily installed in the temporary secondary finishing process; And a cargo window complete finishing process (S 300) for closing the work path (P: see FIG. 1) with a closed inner hull (2: see FIG. 22) and installing an insulating panel and a barrier to finish the installation.

28 is a block diagram showing a temporary temporary finishing process in the method of finishing a cargo hold insulation system of a membrane type liquefied natural gas carrier of the present invention.

1 to 9 and 28, the one-time temporary finishing step (S 100) of the present embodiment is a method of finishing the upper part of a secondary insulation panel 20 installed on an inner hull 1, (S 110) with an additional thermal protector 20a.

An additional thermal protector 20a is installed at the end of the secondary insulation panel 20 (see FIG. 3), and a staple (not shown) is attached to the top plywood of the secondary insulation panel 20 And the like).

The additional thermal protector 20a is installed separately from the conventional thermal protector so that it is possible to prevent damages and damage of the heat insulating panel in the cutting process occurring during the demolishing process described below in advance.

The one-time temporary finishing step (S100) of the present embodiment includes a step S-20 of installing a temporary secondary insulation panel T-20 on the inner hull 1 at the same level adjacent to the secondary insulation panel 20 120).

The secondary insulation panel 20 and the temporary secondary insulation panel T-20 can be fixedly installed on the inner hull 1 at regular intervals by a mastic of epoxy resin.

The temporary secondary insulation panel (T-20) and the secondary insulation panel 20 are made of a material such as top plywood, reinforced polyurethane foam (R-PUF), bottom plywood Sandwich type, and each material can be bonded with a polyurethane glue (PU-glue) or the like.

The secondary temporary finishing step (S100) of the present embodiment is characterized in that a secondary metal sheet S2 is provided on the upper surfaces of the secondary insulation panel 20 and the temporary secondary insulation panel T-20, A temporary secondary membrane T-21 is sealed to the side of the secondary insulation panel T-20 while the lower end of the temporary secondary barrier T-21 is welded to the inner hull 1. [ And the upper end of the temporary secondary barrier T-21 is welded to the secondary metal sheet S2 to seal the secondary layer (S 130).

Here, the secondary metal sheet S2 can be fixed to a top plywood with a screw or the like. The secondary metal sheet S2 enables welding with a temporary secondary barrier T-21, which is a metallic material.

The lower portion of the temporary secondary barrier T-21 is bent in a "? &Quot; shape, and the "? &Quot; portion is welded to the inner hull 1. The temporary secondary barrier T-21 may be configured such that corner shapes provided at the corner portion and flat shapes provided at the flat portion are welded to each other in an overlapping manner.

The upper end of the temporary secondary barrier T-21 protrudes further upward than the secondary metal sheet S2 in step 130 and the temporary primary insulation panel T- 10 are supported and installed.

The one-time temporary finishing step (S 100) of this embodiment includes testing (S 140) the airtightness of the secondary layer.

After the secondary layer is sealed, the airtightness test is performed. Here, the description of the airtightness test technique of the barriers is well known, and a description thereof will be omitted.

10 to 19, the one-time temporary finishing step (S 100) of the present embodiment is characterized in that the upper side of the primary insulation panel (10) installed on the upper part of the secondary insulation panel (20) (step 145) comprising an anchor strip 10a. The additional anchor strip 10a can be installed at the end of the primary insulation panel 10.

The additional anchor strip 10a is installed separately from the existing anchor strip, and thus it is possible to prevent damages and damage of the adiabatic panel in the process of cutting the temporary barrier in the process of demolition described later.

The one-time temporary finishing step (S 100) of the present embodiment is a step of finishing the temporary primary panel (T 100) at the same height as the primary panel 10 and on the upper surfaces of the secondary panel 20 and the temporary panel T- and installing an insulation panel (T-10) (S 150).

The temporary primary insulation panel T-10 may be installed over the secondary insulation panel 20 and the temporary insulation panel T-20. The temporary primary insulation panel T-10 is fixed with a securing device S shown in Fig. 20B. Since the fixing device corresponds to a known technology, a detailed description thereof will be omitted.

The one-time temporary finishing step (S100) of this embodiment is a step (S) of installing a primary metal sheet S1 on the upper surfaces of the primary insulating panel 10 and the temporary heat insulating panel T-10 160).

The temporary one-time finishing step (S100) of the present embodiment seals the first temporary primary barrier T1-11 on the side surface of the temporary primary insulating panel T-10, while the first temporary primary barrier T1- And welding the upper end of the first temporary primary barrier T1-11 to the primary metal sheet S1 (S170) by welding the lower end of the temporary primary barrier T1-T to the lower end of the temporary secondary barrier T-21.

For example, the temporary primary barrier T-11 comprises three parts: a first temporary primary membrane T1-11, a secondary temporary primary membrane T2-11 ) And a third temporary primary membrane (T3-11).

16, the lower end of the first temporary primary membrane T1-11 is bent in a "B" shape, and the "B" Quot; b "portion.

The one-time temporary finishing step (S100) of the present embodiment includes a step (S 180) of sealing the second temporary primary barrier (T2-11) at a position where the primary barrier (11) and the primary metal sheet .

The second temporary primary barrier T2-11 is bent in a " C "shape, and a part (the left side in the figure) of the" Is welded to the primary barrier 11 of the primary panel 10.

The primary metal sheet S1 allows welding with a temporary primary barrier T-11, which is a metal material.

The one-time temporary finishing step (S100) of the present embodiment is to weld the third temporary primary barrier (T3-11) between the first temporary primary barrier (T1-11) and the second temporary primary barrier (T2-11) And sealing the primary layer (S 190).

Both ends of the third temporary primary barrier T1-11 and the second temporary primary barrier T2-11 are sealed at the ends of the third temporary primary barrier T3-11 by a seam welding method.

The one-time temporary finishing step (S100) of the present embodiment includes a step (S191) of testing the airtightness of the primary layer.

After sealing the primary layer, conduct a hermetic test. Here, the description of the airtightness test technique of the barriers is well known, and a description thereof will be omitted.

17 is a plan view for explaining a temporary temporary finishing step, FIG. 18 is a sectional view taken along line E-E of FIG. 17, and FIG. 19 is a sectional view taken along the line E'-E 'of FIG.

Referring to FIGS. 17 to 19, the secondary temporary finishing step of the present embodiment includes a secondary layer and a primary layer. The secondary layer is located on the inner hull side, and the primary layer is located on the liquefied gas side.

First, the structure of the secondary layer is as follows.

A secondary insulation panel 20 is provided with an additional thermal protector 20a on the inner hull 1. The secondary insulation panel 20 can be fixed by a mastic of epoxy resin and a securing device (not shown).

The additional thermal protector 20a is installed at the end of the secondary insulation panel 20 and fixed to the top plywood of the secondary insulation panel 20 by a staple can do.

The additional thermal protector 20a is installed separately from the conventional thermal protector to prevent damage to the heat insulating panel during the demolding process. Here, the cutting process refers to cutting the temporary barrier along the cutting line to remove the temporary barrier.

A temporary secondary insulation panel T-20 is provided on the inner hull 1 at the same level adjacent to the secondary insulation panel 20. [ The temporary secondary insulation panel (T-20) can be fixed by a mastic of epoxy resin and a securing device (not shown).

The secondary insulation panel 20 and the temporary secondary insulation panel T-20 can be fixedly installed on the inner hull 1 at regular intervals by a mastic which is an epoxy resin.

The temporary secondary insulation panel (T-20) and the secondary insulation panel 20 are made of a material such as top plywood, reinforced polyurethane foam (R-PUF), bottom plywood Sandwich type, and each material can be bonded with a polyurethane glue (PU-glue) or the like.

A secondary metal sheet S2 is provided on the upper surface of the secondary insulation panel 20 and the temporary secondary insulation panel T-20. a temporary secondary membrane (T-21) is sealed. The lower end of the temporary secondary barrier T-21 is welded to the inner hull 1 and the upper end of the temporary secondary barrier T-21 is welded to the secondary metal sheet S2 to seal the secondary layer.

The lower portion of the temporary secondary barrier T-21 is bent in a "? &Quot; shape, and the "? &Quot; portion is welded to the inner hull 1. The temporary secondary barrier T-21 may have a corner shape provided at a corner portion and a flat shape provided at a flat portion, and both ends may be overlapped with each other to be welded or welded together.

The upper end of the temporary secondary barrier T-21 is welded to the secondary metal sheet S2 to seal the secondary layer. Here, the secondary metal sheet S2 can be fixed to the top plywood of the secondary insulation panel 20 with a screw or the like. The secondary metal sheet S2 enables welding with the temporary secondary barrier T-21, which is a metal material. That is, the secondary metal sheet S2 enables the welding between metals as an invar or cloth material.

The upper end of the temporary secondary barrier T-21 is further protruded upward than the secondary metal sheet S2 and the side surface of the temporary primary heat-insulating panel T-10 is supported by the protruding portion.

The structure of the primary layer is as follows.

A primary insulation panel 10 is installed on the upper part of the secondary insulation panel 20. An additional anchor strip 10a is installed on the top of the primary insulation panel 10. [

The additional anchor strip 10a is installed at the end of the primary insulation panel 10 and can be fixed to the top plywood of the primary insulation panel 10 by rivets or the like.

The additional anchor strip 10a is installed in addition to the existing thermal protector to prevent damage to the adiabatic panel during the cutting process of the temporary barrier during the demolition process.

A temporary primary insulation panel (T-10) is installed on top of the secondary insulation panel 20 and the temporary insulation panel T-20 at the same height as the primary insulation panel 10.

The temporary primary insulation panel T-10 may be installed over the secondary insulation panel 20 and the temporary insulation panel T-20. The temporary primary insulation panel T-10 is fixed with a securing device S (see Fig. 20B). Since a securing device corresponds to a known technology, a detailed description thereof will be omitted.

A primary metal sheet S1 may be provided on the upper surfaces of the primary heat insulating panel 10 and the temporary heat insulating panel T-10 by a screw (not shown) or the like.

The first temporary primary barrier T1-11 is sealed to the side of the temporary primary insulation panel T-10 while the lower end of the first temporary primary barrier T1-11 is welded to the lower end of the temporary secondary barrier T- And weld the upper end of the first temporary primary barrier T1-11 to the primary metal sheet S1.

The lower end of the first temporary primary membrane T1-11 is bent in a "B" shape and the "B" portion is welded onto the lower end of the temporary secondary barrier T-21.

The second temporary primary barrier T2-11 is sealed at the position where the primary barrier 11 and the primary metal sheet S1 are adjacent to each other.

The second temporary primary barrier T2-11 is bent in a " C "shape, and a part (the left side in the figure) of the" Is welded to the primary barrier (11) of the primary panel (10).

The primary metal sheet S1 allows welding with a temporary primary barrier T-11, which is a metal. That is, the secondary metal sheet S2 can be welded between the metals as an invar or saucer material.

 Between the first temporary primary barrier T1-11 and the second temporary primary barrier T2-11, a third temporary primary barrier T3-11 is welded to seal the primary layer.

Both ends of the third temporary primary barrier T3-11 may be sealed by seam welding at the ends of the first temporary primary barrier T1-11 and the second temporary primary barrier T2-11.

29 is a block diagram showing a demolition process in the deadline construction method of a cargo hold insulation system of a membrane type liquefied natural gas carrier of the present invention.

Hereinafter, the demolishing process will be described with reference to FIG. 29 and FIGS. 20A to 20E.

The demolishing step S 200 is a step of cutting and removing the welded portions of the first temporary primary wall T 1 - 11, the second temporary primary wall T 2 - 11 and the third temporary primary wall T 3 - 11 Step S 210; A step (S 220) of removing the temporary primary insulation panel (T-10); (S 230) cutting and removing the welded portion of the temporary secondary barrier (T-20); Removing the additional thermal protector 20a (S 240); And removing the temporary secondary insulation panel (T-20) (S 250).

More specifically, in step 210, a first temporary primary barrier T1-11, a second temporary primary barrier T2-11, and a third temporary primary barrier T1-11 are formed by using a cutter (not shown) T3-11) is cut along the cutting line shown in the drawing and removed.

20A and 20B, the first temporary primary wall T1-11 is first removed by cutting both sides (left side in the drawing) of the left edge of the temporary primary insulation panel T-10.

Next, both right side edges (right side in the figure) of the right side edge of the temporary primary insulating panel T-10 are cut along the cutting line to form the second temporary primary barrier T2-11 and the third temporary primary barrier T3-11 Remove. Then, the primary metal sheet S1 is removed.

In the step S220, the temporary primary insulation panel T-10 is removed as shown in FIGS. 20B and 20C. The securing device S is removed in advance before removing the temporary primary insulation panel T-10.

In the step S 230, as shown in FIGS. 20C and 20D, the welding portion of the temporary secondary barrier T-21 is cut along the cutting line and removed. The upper and lower ends of the temporary secondary barrier T-20 are cut along the cutting line to remove the temporary secondary barrier T-20.

In step S 240, as shown in FIG. 20D, a portion of the secondary metal sheet S2 is removed by cutting along the cutting line. A secondary barrier 21 'to be described later is welded to the remainder of the secondary metal sheet S2 by sewing welding or the like.

20E, the mastic which is the epoxy resin of the inner hull 1 is removed, and the temporary secondary insulation panel T-20 is separated and removed.

Meanwhile, FIG. 30 is a block diagram illustrating a cargo hold complete closing process in the method of finishing a cargo hold insulation system of a membrane type LNG carrier of the present invention.

Hereinafter, the demolishing process will be described with reference to FIG. 30 and FIGS. 22 to 26. FIG.

The cargo hold complete closing process (S 300) includes closing (S 310) the work passage (P) by welding the finished inner hull (2); And welding (S320) the stud bolts (3) to the closed inner hull (2).

The cargo hold complete finishing step (S 300) includes a step (S 330) of fixing and fixing the secondary thermal insulating panel 20 'using the stud bolts 30. The secondary insulation panel 20 'can be installed and fixed using the mastic. Although not shown in the drawing, the stud bolt 30 is provided with a fixing device to fix the secondary thermal insulation panel 20 '.

The cargo hold complete finishing process S 300 includes sealing the secondary barrier 21 'to the upper surface of the secondary insulation panel 20' (S 340).

The cargo hold complete finishing process (S 300) includes a step (S 350) of fixing and fixing the primary heat insulating panel 10 'to the upper side of the secondary barrier 21'.

The cargo hold complete finishing process (S 300) includes a step (S 360) of sealing the primary barrier 11 'on the upper surface of the primary insulation panel 10' to complete the cargo window.

As described above, in an LNG cargo hold having a corrugation secondary barrier, the area that can be cut for a work passage is limited in the structure. In the present invention, the membrane installed near the work passage of the cargo hold By adopting a method of finishing the insulation panel by cutting the insulation panel to the minimum, the airtightness test and the finishing process of the primary and secondary barriers can be efficiently performed.

Also, in a membrane-type cargo hold, typically a primary and a secondary barrier metal, finishing is required at the end of the corrugation for finishing the airtight test. In the present invention, both the primary and secondary barriers have a straight bar ) Type temporary membrane, it is possible to perform a simple finishing process and to remarkably shorten a construction period.

Further, in the present invention, since the processing operation can be performed with the temporary adiabatic panel of a simple shape and the temporary barrier, there is an advantage that the manufacture of the cargo hold is easy and the production cost can be reduced.

Further, since the additional thermal protector is provided on the upper part of the secondary insulation panel and the additional anchor strip is provided on the upper part of the primary insulation panel, it is possible to prevent damages and damage of the insulation panel in the process of cutting the temporary barrier in the demolition process in advance have.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

For example, in the present embodiment, the primary insulation panel and the secondary insulation panel are respectively divided into an insulation panel adjacent to the liquefied gas and an insulation panel adjacent to the inner hull. However, for convenience of explanation, And vice versa.

Further, the thickness of the heat insulating panel and the barrier (membrane) is only shown arbitrarily for the sake of convenience of explanation, and is not limited thereto.

The upper (upper) side and the lower (lower) side are arbitrarily set for convenience of explanation, and the present invention is not limited thereto.

1: inner hull
2: Closed inner hull
3: Stud bolt
10: Primary insulation panel
10a: additional anchor strip
T-10: Temporary primary insulation panel
T1-11: first temporary primary membrane (first temporary primary membrane)
T2-11: secondary temporary primary membrane
T3-11: third temporary primary membrane (third temporary primary membrane)
20: Secondary insulation panel
20a: additional thermal protector
T-20: Temporary secondary insulation panel
T-21: Temporary secondary membrane
S: securing device
S1: primary metal sheet
S2: secondary metal sheet

Claims (21)

A method for finishing a cargo hold of an insulation system of a membrane type liquefied natural gas carrier for finishing a work channel (P) of a cargo hold,
A temporary temporary finishing step (S 100) of temporarily closing the temporary insulating panel and the temporary barrier around the work path (P) and testing the tightness;
A demolishing process (S 200) for demolishing the temporary adiabatic panel and the temporary barrier temporarily installed in the one temporary finishing process; And
A cargo hold complete finishing process (S 300) for closing the work path (P) with the finishing inner hull (2) and finishing the installation by installing a heat insulating panel and a barrier; / RTI >
Finishing method of membrane type LNG cargo hold insulation system. The method according to claim 1,
Characterized in that the temporary temporary finishing step (S100) is a temporary finishing treatment by directly welding the temporary secondary barrier (T-21) and the temporary primary barrier (T-11)
Finishing method of membrane type LNG cargo hold insulation system. The method according to claim 1,
The one-time temporary finishing step (S100)
(S 110) with an additional thermal protector (20a) on top of the secondary insulation panel (20) installed on the inner hull (1);
(S 120) installing a temporary secondary insulation panel (T-20) on the inner hull (1) at a leveling adjacent to the secondary insulation panel (20);
A secondary metal sheet S2 is provided on the upper surface of the secondary insulation panel 20 and the temporary secondary insulation panel T-20, and a temporary metal sheet S2 is provided on the side surface of the temporary insulation panel T- The lower end of the temporary secondary barrier T-21 is welded to the inner hull 1 and the upper end of the temporary secondary barrier T- Sealing the secondary layer by welding to the secondary metal sheet S2 (S 130);
Testing the airtightness of the secondary layer (S 140);
A step (S 145) of providing an additional anchor strip (10a) on top of the primary insulation panel (10) installed on the upper part of the secondary insulation panel (20);
(S 150) a temporary primary insulation panel (T-10) on top of the secondary insulation panel (20) and the temporary insulation panel (T-20) at the same height as the primary insulation panel (10);
A step (S 160) of installing a primary metal sheet (S1) on the upper surfaces of the primary insulating panel (10) and the temporary heat insulating panel (T-10);
The first temporary primary wall T1-11 is sealed to the side of the temporary primary wall panel T-10 while the lower end of the first temporary primary wall T11 is connected to the temporary secondary wall T- (S 170) of welding the upper end of the first temporary primary barrier (T1-ll) to the primary metal sheet (S1);
Sealing (S180) the second temporary primary barrier (T2-11) at a position adjacent to the primary barrier (11) and the primary metal sheet (S1);
Sealing (S 190) the first layer by welding a third temporary primary barrier (T3-11) between the first temporary primary barrier (T1-11) and the second temporary primary barrier (T2-11); And
Testing the airtightness of the primary layer (S191); / RTI >
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 3,
In the step S 130, the upper end of the temporary secondary barrier T-21 protrudes upward from the secondary metal sheet S2. In the step S 150, the temporary primary insulation panel T -10), and the temporary primary insulation panel (T-10) is installed.
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 3,
Characterized in that the thermal protector (20a) is fixed to the top plywood of the secondary insulation panel (20) by a staple.
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 3,
Characterized in that the primary and secondary metal sheets (S1, S2) are made of either an invar or a saucer material and are fixed with screws.
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 3,
Characterized in that the anchor strip (10a) is additionally applied to the end of the primary insulation panel (10)
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 3,
The demolishing process (S 200)
(S 210) cutting and removing a welded portion of the first temporary primary barrier (T1-11), the second temporary primary barrier (T2-11), and the third temporary primary barrier (T3-11) ;
Removing (S 220) the temporary primary insulation panel (T-10);
(S 230) cutting and removing a welded portion of the temporary secondary barrier (T-20);
Removing a portion of the secondary metal sheet S2 (S 240); And
Removing (S250) the temporary secondary insulation panel (T-20); / RTI >
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method according to claim 1,
The cargo hold complete closing process (S 300)
Closing the work path P by welding the closed inner hull 2 (S 310);
Welding (S320) the stud bolts (3) to the closed inner hull (2);
A step (S 330) of fixing and fixing the secondary thermal insulation panel 20 'using the stud bolts 30;
Sealing the secondary barrier 21 'to the upper surface of the secondary insulation panel 20' (S 340);
A step (S 350) of fixing and fixing the secondary insulation panel (20 ') on the upper side of the secondary barrier (21'); And
Sealing the primary barrier 10 'on the upper surface of the secondary insulation panel 20' to complete the cargo window (S 360); / RTI >
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. A method for finishing a cargo hold of a membrane-type liquefied natural gas carrier for finishing a work channel (P) of a cargo hold, comprising the steps of temporarily closing a temporary adiabatic panel and a temporary barrier around the work channel (P) A secondary temporary finishing step (S100); A demolishing process (S 200) for demolishing the temporary adiabatic panel and the temporary barrier temporarily installed in the one temporary finishing process; (S 300) closing the work passage (P) with the closed inner hull (2) and closing the installation by installing a heat insulating panel and a barrier; ≪ / RTI >
The one-time temporary finishing step (S100)
(S110) comprising an additional thermal protector (20a) on top of the secondary insulation panel (20) installed on the inner hull (1);
Installing a temporary secondary insulation panel (T-20) on the inner hull (1) (S 120);
A secondary metal sheet S2 is provided on the upper surface of the secondary insulation panel 20 and the temporary secondary insulation panel T-20, and a temporary metal sheet S2 is provided on the side surface of the temporary insulation panel T- Sealing the secondary barrier (T-21) to seal the secondary barrier (S 130);
Testing the airtightness of the secondary layer (S 140);
A step (S 145) of providing an additional anchor strip (10a) on top of the primary insulation panel (10) installed on the upper part of the secondary insulation panel (20);
(S 150) a temporary primary insulation panel (T-10) on top of the secondary insulation panel (20) and the temporary insulation panel (T-20);
A step (S 160) of installing a primary metal sheet (S1) on the upper surfaces of the primary insulating panel (10) and the temporary heat insulating panel (T-10);
The first temporary primary wall T1-11 is sealed to the side of the temporary primary wall panel T-10 while the lower end of the first temporary primary wall T11 is connected to the temporary secondary wall T- (S 170) of welding the upper end of the first temporary primary barrier (T1-ll) to the primary metal sheet (S1);
Sealing (S180) the second temporary primary barrier (T2-11) at a position adjacent to the primary barrier (11) and the primary metal sheet (S1);
Sealing (S 190) the first layer by welding a third temporary primary barrier (T3-11) between the first temporary primary barrier (T1-11) and the second temporary primary barrier (T2-11); And
Testing the airtightness of the primary layer (S191); / RTI >
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 10,
In the step S 130, the upper end of the temporary secondary barrier T-21 protrudes upward from the secondary metal sheet S2. In the step S 150, the temporary primary insulation panel T -10), and the temporary primary insulation panel (T-10) is installed.
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 10,
The demolishing process (S 200)
(S 210) cutting and removing a welded portion of the first temporary primary barrier (T1-11), the second temporary primary barrier (T2-11), and the third temporary primary barrier (T3-11) ;
Removing (S 220) the temporary primary insulation panel (T-10);
(S 230) cutting and removing a welded portion of the temporary secondary barrier (T-20);
Removing a portion of the secondary metal sheet S2 (S 240); And
Removing (S250) the temporary secondary insulation panel (T-20); / RTI >
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. The method of claim 10,
The cargo hold complete closing process (S 300)
Closing the work path P by welding the closed inner hull 2 (S 310);
Welding (S320) the stud bolts (3) to the closed inner hull (2);
A step (S 330) of fixing and fixing the secondary thermal insulation panel 20 'using the stud bolts 30;
Sealing the secondary barrier 21 'to the upper surface of the secondary insulation panel 20' (S 340);
A step (S 350) of fixing and fixing the primary insulation panel 10 'to the upper side of the secondary barrier 21'; And
Sealing the primary barrier 10 'on the upper surface of the primary insulation panel 10' to complete the cargo window (S 360); / RTI >
A Finishing Method for the Reservoir Insulation System of Membrane Type LNG Carrier. A membrane-type liquefied natural gas carrier for finishing the work path (P) of the cargo hold, characterized in that a metal membrane is applied to the primary and secondary barriers and the primary and secondary barriers are made of corrugated membranes, The method comprising the steps of:
The temporary secondary barrier and the temporary primary barrier are welded in the form of a straight bar to perform a tightness test, and after the temporary secondary barrier and the temporary primary barrier are removed, And the barrier wall and the primary barrier are completed to complete the finish construction.
A method for finishing a cargo hold of an insulation system of a membrane type liquefied natural gas carrier. A secondary insulation panel 20 having an additional thermal protector 20a and mounted on the inner hull 1;
A temporary secondary insulation panel (T-20) installed on the inner hull (1) at the same level adjacent to the secondary insulation panel (20);
A secondary metal sheet S2 provided on the upper surface of the secondary insulation panel 20 and the temporary secondary insulation panel T-20;
The lower end portion is welded to the inner hull 1 and the upper end portion is welded to the secondary metal sheet S2 to form a temporary A secondary secondary membrane (T-21);
A primary insulation panel 10 installed on the upper part of the secondary insulation panel 20 and provided with an additional anchor strip 10a on the upper part thereof;
A temporary primary insulation panel T-10 installed above the secondary insulation panel 20 and the temporary insulation panel T-20 at the same height as the primary insulation panel 10;
A primary metal sheet S1 provided on the upper surfaces of the primary insulation panel 10 and the temporary insulation panel T-10;
A first temporary primary barrier T1 (T1) is provided on a side surface of the temporary primary insulation panel T-10, a lower end portion is welded to a lower end of the temporary secondary barrier T-21, and an upper end is welded to the primary metal sheet S1. -11);
A second temporary primary barrier (T2-11) installed at a position adjacent to the primary barrier (11) and the primary metal sheet (S1); And
A third temporary primary barrier (T3-11) welded between the first temporary primary barrier (T1-11) and the second temporary primary barrier (T2-11) to seal the primary layer; / RTI >
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier. 16. The method of claim 15,
Wherein the secondary metal sheet S2 is made of an invar or a saucer material so that the secondary metal sheet S2 can be welded to the temporary secondary barrier T-
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier. 16. The method of claim 15,
The upper end of the temporary secondary barrier T-21 further protrudes above the secondary metal sheet S2 and the side surface of the temporary primary thermal insulating panel T-10 is supported by the protruded portion. doing,
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier. 16. The method of claim 15,
The lower portion of the first temporary primary membrane T1-11 is bent in a "B" shape and the "B" portion is welded to the lower end of the temporary secondary barrier T-21 ≪ / RTI >
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier. 16. The method of claim 15,
The primary metal sheet S1 can be welded to the temporary primary barrier T-11 made of metal and the secondary metal sheet S2 is made of an invar or saucer material. ,
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier. A temporary secondary barrier is provided at the end of the secondary insulation panel and a bar-shaped temporary secondary barrier is provided at the end of the temporary secondary insulation panel, and the upper part of the temporary secondary barrier is connected to the secondary metal sheet (S2) to seal the secondary layer,
A temporary primary insulation panel is installed at the end of the primary insulation panel, a primary metal sheet S1 is installed on the upper surface of the temporary primary insulation panel, and a temporary primary barrier is installed at the end of the temporary primary insulation panel. Characterized in that the lower part of the temporary primary barrier is welded to the inner hull and the upper part is welded to the primary metal sheet S1 to seal the primary layer.
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier. A secondary insulation panel 20 'installed in the inner hull 1;
A secondary barrier 21 'sealed on the upper surface of the secondary insulation panel 20';
A primary insulation panel 10 'installed above the secondary barrier 21'; And
A primary barrier 11 'sealed to the upper surface of the primary insulation panel 10'; To close the cargo hold completely,
Reservoir Construction of Membrane Type Liquefied Natural Gas Carrier with Insulation System for Cargo Hold.

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