JP2946311B2 - Manufacturing method of membrane panel for assembling unit of membrane inner tank for low temperature tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to a technical field related to an assembly unit membrane panel for assembling and configuring a low-temperature tank inner membrane for storing LNG or the like by welding.

[0002]

2. Description of the Related Art Conventionally, as an assembly unit membrane panel, for example, the one described in Japanese Patent Publication No. 56-53678 is known.

[0003] This conventional assembly unit membrane panel,
As shown in FIG. 13, corrugations 2 and 3 are provided in a cross shape which is a part of a lattice shape on the flat plate portion 1, and the entire planar shape is a square in which one intersection 4 of the corrugations 2 and 3 is located at the center. Is formed. Corrugations 2 and 3
Usually, it is formed by pressing with a mold.

In this conventional assembly unit membrane panel, it is welded to each other and assembled as a membrane inner tank for a low-temperature tank, and corrugations 2 and 3 are arranged in a lattice shape to expand and contract due to thermal behavior such as warming up and cooling down. This will be absorbed as the rotation of the flat plate portion 1 due to the corrugation expansion and contraction.

[0005]

The above-mentioned conventional assembly unit membrane panel is composed of a small unit in which one intersection 4 of corrugations 2 and 3 is provided at the center of a square. Requires a large number of sheets, and the number of welding lines is large and long. For this reason, there is a problem that assembling work for the inner tank of the membrane for the low-temperature tank and subsequent inspection work are troublesome, and the construction period of the low-temperature tank is long and the construction cost is increased. Further, with respect to a long welding line length, there is a problem that maintenance management after construction is troublesome and durability is not reliable.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to manufacture a membrane unit panel for assembling an inner tank of a membrane for a low-temperature tank which can shorten a welding line length for assembly. And a manufacturing method suitable for the above.

[0007]

Means for Solving the Problems The object is to provide a rectangular object .
Multiple corrugation intersections in the panel material
Assembled unit membrane contained in one longitudinal row of material
When molding a panel using a press mold,
Shape corrugated panel material with one intersection
Press some to perfect shape, others to imperfect
Moving the panel material following the pressing to the molded shape
And a corrugation containing one adjacent intersection
Pressed into a complete formed shape,
Steps to correct all molding shapes to complete molding shapes are performed sequentially
Of the inner tank of the membrane for the cryogenic tank
In the manufacturing method of the membrane panel,
Corrugation including the crossing point
After fitting and positioning and restraining the panel material, the next process
Press one after another, and from one side of the panel material
This is achieved by repeating each step sequentially .

[0008] The above object is for a cryogenic tank according to claim 1.
Manufacturing method of membrane panel assembling unit of membrane tank
In the case of the col
Press forming of the gate and the length of the panel material
Both ends of the corrugation in the hand direction are incompletely formed
Then, the corrugation including this intersection is used in the forming die of the next process.
After mating and positioning and restraining the panel material,
Complete corrugation with the next process mold
And press the intersection adjacent to the earliest intersection
Press forming corrugation, then panel material
Move and include the earliest intersection formed in the panel material
Corrugation is fitted to the mold of the next process and panel material
After positioning the material, the other imperfect corrugation
Press the part to the complete molding shape with the mold of the next process,
Shape corrugations including intersections adjacent to the earliest intersection
At the very least, press sequentially from left to right from the center of the panel material
This is achieved by developing processing .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an assembly unit panel for a low-temperature tank inner tank and a method for manufacturing the same according to the present invention will be described below with reference to FIGS.

FIGS. 1 to 5 show an embodiment (1) of a unit panel for assembling an inner tank of a membrane for a low-temperature tank and a method of manufacturing the same according to the present invention.

In this embodiment, a rectangular thin panel material A is pressed in two steps.

In the first step, as shown in FIG.
Pressing is performed only at one end of the rectangular shape of the membrane panel material A. This press, as shown in FIG.
a, using a molding die 5 composed of a lower die 5b.

The corrugations 2 and 3 formed by the press in the first step are each formed of two parallel strips and formed in a cross shape which is a part of a lattice. And the intersection 4 of both corrugations 2 and 3 is one. One corrugation 2 has a complete molded shape that reaches both longitudinal sides Aa of the membrane panel material A in a continuous shape. Another one
One corrugation 3 is formed in a direction orthogonal to the center of the corrugation 2 and has a discontinuous shape interrupted at the intersection 4. The portion 3a of the corrugation 3 that reaches the short side Ab of the membrane panel material A has a completely formed shape. The portion 3b of the corrugation 3 extending in the opposite direction from the portion 3a has an incompletely formed shape (the degree of unevenness is not completed).

In the second step, as shown in FIG.
Pressing is performed only at the other end of the position where the membrane panel material A is moved in the longitudinal direction of the rectangle from the pressing position in the first step. This press, as shown in FIG.
This is performed using the molding die 5 including the lower die 5b. At this time, a corrugation structure corresponding to the corrugations 2 and 3 pressed in the first step is also provided in the mold 5, and the corrugations 2 and 3 pressed in the first step are fitted into the mold 5 to restrict the positioning. By doing so, the positional accuracy of the press in the second step can be improved.

The corrugations 6, 7 formed by the press in the second step are the same as the corrugations 2, 3 formed by the press in the first step. However, although the corrugations 6 parallel to the one corrugation 2 formed in the first step have a perfect molded shape, the intersections 4
And a discontinuous shape interrupted by another corrugation 7. Another corrugation 7 is:
The other one of the corrugations 3 formed in the first step
To the one part 3b of the membrane panel material A
Is formed in a continuous shape that reaches the short side Ab of the above.

In the pressing in the second step, one part 3b of the other one of the corrugations 3 formed of the incompletely formed shape formed in the first step is corrected to a complete formed shape. At this time, one part 3b of the other one of the corrugations 3 having an incompletely formed shape guides the unevenness of the other one of the newly formed corrugations 7, and the corrugations 3 (3b), 7 Connection accuracy.

As shown in FIG. 4, the molding dies 5 used in the first step and the second step are assembled in a cross shape with a part of the corrugations 2, 3, 6, and 7 in common. It can be. In the molding die 5 shown in FIG. 4, the first process position a and the second process position b of the membrane panel material A are turned. As shown in FIG. 5, two corrugations 2, 3, 6, and 7 can be shared and two separate corrugations can be installed. In the molding die 5 shown in FIG. 5, the first process position a and the second process position b of the membrane panel material A are changed.

After the second step, necessary post-processing and the periphery are cut to a prescribed size to obtain a finished product A 'as shown in FIG. 1 (c).

According to this embodiment, although the flat plate portion 1 between the parallel corrugations 2 and 6 is pulled in the opposite directions in the first step and the second step, it is not simultaneously pulled in the opposite directions. Therefore, there is no breakage. In addition, from the above-described high positional accuracy and connection accuracy, a precise molded shape can be obtained even though the corrugations 2, 3, 6, and 7 are pressed in two steps.

Further, the finished product A ′ is a corrugation 2,
The structure includes two intersection points 4 of 3, 6, and 7, and a plurality of conventional assembly unit membrane panels are arranged in a line in the longitudinal direction and integrated. Therefore, the size of the assembly unit of the low temperature tank membrane inner tank is increased, and the welding line length is shortened. As a result, the labor for assembling the inner tank of the membrane for the low-temperature tank and the subsequent inspection work are reduced, and the construction period of the low-temperature tank is shortened and the construction cost is reduced. In addition, with regard to the shortened welding line length, maintenance management after construction is easy and reliability is obtained in durability.

FIGS. 6 to 8 show an embodiment (2) of a unit panel for assembling a membrane inner tank for a low-temperature tank and a method of manufacturing the same according to the present invention.

In this embodiment, a rectangular thin panel material A is pressed in three steps.

In this embodiment, the first step (FIG. 6)
In (a)), pressing is performed only at one end of the rectangular shape of the membrane panel material A, and in the second step (FIG. 6B), pressing is performed only at the central portion of the rectangular shape of the membrane panel material A. The process (FIG. 6 (c)) is performed for the membrane panel material A.
Is pressed only at the other end of the rectangle.

In this embodiment, the corrugation 7 formed in the second step is also formed with an imperfectly formed shape 7 'and corrected in the third step. Similar actions and effects are achieved.

As shown in FIG. 7, in the molding die 5 in which a part of the corrugations 2, 3, 6, and 7 are shared and assembled in a cross shape, the first process position a of the membrane panel material A starts. It turns to the second process position b and slides from the second process position b to the third process position c. Further, as shown in FIG. 8, in the molding dies 5 in which two corrugations 2, 3, 6, and 7 are shared and separately installed, the first process position a of the panel material A is shifted to the second process position. Change the set to b,
From the second process position b to the third process position c, the slide is performed from the first process position a in addition to the setting change.

The finished product A 'of this embodiment includes three intersections 4 of corrugations 2, 3, 6, and 7,
It is larger than the finished product A 'of the first embodiment.

FIGS. 9 to 11 show an embodiment (3) of an assembly unit membrane panel of a membrane inner tank for a low-temperature tank and a method of manufacturing the same according to the present invention.

In this embodiment, as in the above-described embodiment (2), a rectangular thin membrane panel material A is pressed in three steps.

In this embodiment, the first step (FIG. 9)
(A)) is pressed only at the center of the rectangular shape of the membrane panel material A, and the second step (FIG. 9 (b)) is pressed only at one end of the rectangular shape of the membrane panel material A. The step (FIG. 9 (c)) is a membrane panel material A
Is pressed only at the other end of the rectangle.

In this embodiment, except that an incompletely formed shape 7 ′ is formed at both ends of the corrugation 7 formed in the first step and is corrected in the second and third steps, Functions and effects similar to those of the modes (1) and (2) are achieved.

As shown in FIG. 10, in the molding die 5 in which a part of the corrugations 2, 3, 6, and 7 are assembled in a cross shape, a part of the membrane panel material A from the first process position a is started. From the second process position b to the third process position b,
It turns to the process position c. In addition, as shown in FIG. 11, in the molding dies 5 in which two parts are separately provided while sharing a part of the corrugations 2, 3, 6, and 7, the second step from the first step position a of the membrane panel material A is performed. The turn from the second process position b to the third process position c is performed by changing the set to the position b.

FIG. 12 shows a modification of the finished product A 'in which the lengths of both short sides Ab of the membrane panel material A are different. Such a finished product A 'can be manufactured in the above-described embodiment.

As described above, in addition to the embodiment shown in the drawings, the corrugations 2, 3, 6, and 7 are formed in a single strip, or the corrugations 2, 3, 6, and 7 are in communication with each other at the intersection 4. Can be implemented without any problem. In addition, 4
It is also possible to perform a press in the process.

[0034]

As described above, the assembly unit membrane panel of the membrane inner tank for a low-temperature tank according to the present invention has a structure in which a plurality of conventional assembly unit panels are arranged in a line in the longitudinal direction and integrated. This has the effect of increasing the size of the assembly unit of the inner tank of the membrane for the low-temperature tank and shortening the welding line length. In addition, this effect eliminates the need for assembling the inner tank of the membrane for the low-temperature tank and the subsequent inspection work, thereby shortening the construction period of the low-temperature tank and reducing the construction cost. In addition, due to this effect, due to the shortened welding line length, there is an effect that the maintenance management after the installation is easy and the durability is also reliable.

Further, the method of manufacturing a unit membrane panel for assembling a membrane inner tank for a low-temperature tank according to the present invention provides a method for manufacturing a membrane panel for an inner tank for a low-temperature tank according to the present invention, which does not impair the effect. hand,
Since a tensile force is not simultaneously applied to the membrane panel material in the opposite direction, there is an effect that the membrane panel material can be manufactured without breaking.

Furthermore, since the press is guided to the imperfect forming shape of the press in the previous step and the press is performed while correcting it to the perfect forming shape in the next step, there is an effect that the connection accuracy of the press in both steps is increased. .

Further, the above-mentioned effect can be obtained even if a multi-step of three or more steps is adopted.

Further, since the corrugation pressed in the previous step is fitted and fixed in the forming die in the next step, the positional accuracy of the press in the next step is increased.

[Brief description of the drawings]

FIG. 1 is an embodiment of a unit panel for assembling an inner tank of a membrane for a low-temperature tank and a method of manufacturing the same according to the present invention (1).
(A) is a perspective view showing a first step and a sectional view taken along line XX of a perspective view, and (b) is a perspective view showing a second step and a sectional view taken along line YY of a perspective view. (C) is a perspective view of the finished product.

FIG. 2 is a sectional view showing the press of FIG.

FIG. 3 is a sectional view showing the press of FIG. 1 (b).

FIG. 4 is a plan view showing a setting position of a panel material in a molding die in each step of FIG. 1;

FIG. 5 is a diagram showing a modification of FIG. 4;

FIG. 6 is an embodiment (2) of an assembly unit panel of a membrane inner tank for a low-temperature tank and a method of manufacturing the same according to the present invention.
(A) is a perspective view showing a first step,
(B) is a perspective view showing a second step, (c) is a perspective view showing a third step, and (d) is a perspective view of a completed product.

FIG. 7 is a plan view showing a setting position of a panel material on a molding die in each step of FIG. 6;

FIG. 8 is a diagram showing a modification of FIG. 7;

FIG. 9 is an embodiment (3) of an assembly unit panel of a membrane inner tank for a low-temperature tank and a method of manufacturing the same according to the present invention.
(A) is a perspective view showing a first step,
(B) is a perspective view showing a second step, (c) is a perspective view showing a third step, and (d) is a perspective view of a completed product.

10 is a plan view showing a setting position of a panel material on a molding die in each step of FIG. 9;

FIG. 11 is a diagram showing a modification of FIG. 10;

FIG. 12 is a perspective view showing a modification of the finished product.

FIG. 13 is a perspective view showing an assembly unit panel of a conventional membrane inner tank for a low-temperature tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flat plate part 2 Corrugation 3 Corrugation 6 Corrugation 7 Corrugation 4 Intersection 5 Mold 5 A Membrane panel material A 'Finished product

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F17C 3 / 00,3 / 12 F17C 13/00 B65D 90 / 00,90 / 08 B21D 13/02 B21D 47 / 00

Claims (2)

(57) [Claims] A rectangular panel material is provided with a plurality of corges.
Is included in a longitudinal row of panel material
Assembly membrane membrane panel using a press mold
One point of intersection in rectangular panel material
Part of the corrugation, including
Following the process of pressing the other part into an imperfectly formed shape.
To move the panel material and
Press of corrugation including the intersection of
At this time, the previously incomplete molding shape is replaced with the complete molding shape.
Low temperature tank
Unit for assembling the inner tank of the membrane
And corrugation including the intersection formed in the previous process
The panel material is positioned and restrained by
After that, press of the next process is performed sequentially, and panel
Characteristic of repeating each process sequentially from one side of the material
Assembling unit membrane of the inner tank of the membrane for the low temperature tank
Panel manufacturing method. 2. The membrane for a low-temperature tank according to claim 1.
In the manufacturing method of the assembly unit membrane panel of the inner tank,
Corrugation with one intersection in the center of the panel material
And press the panel material in the longitudinal direction.
Both ends of the lug are formed with imperfect shapes and
The corrugations including points are fitted to
After positioning and restraining the tunnel material,
Press the gating to the perfect molding shape with the molding die of the next process
And the corge that includes the intersection adjacent to the earliest intersection
Press-formed and then transfer the panel material
And the corrugation including the earliest intersection formed in the panel material
Position the panel material by fitting the
After the decision and restraint, the other imperfect corrugation
Press into the complete molding shape with the molding die of the next process, and
The corrugation including the intersections adjacent to the points is shaped,
Press working in the left and right direction from the center of the panel material
Of the inner tank of the membrane for the low-temperature tank
Manufacturing method of assembly unit membrane panel.