KR102326525B1 - An apparatus for welding of lng tank sealing wall - Google Patents

Abstract

The present invention relates to a welding frame on which a plurality of sealing members to be welded to each other are seated, a torch part having a welding torch for welding a connection portion between a plurality of sealing members seated on the welding frame, and a torch part in the upper part of the welding frame on the XYZ axis It is provided in the transfer crane and the torch unit for transferring in the direction of the welding jig and is provided between the transfer crane and the torch unit to press and fix the connection part between the sealing members to be welded, and guide the welding direction of the welding torch, the torch unit and the It provides a welding apparatus for manufacturing a sealing wall of an LNG cargo hold including a rotating part for rotating the welding jig.

Description

Welding device for manufacturing sealing wall of LNG cargo hold {AN APPARATUS FOR WELDING OF LNG TANK SEALING WALL}

The present invention relates to a welding device for manufacturing a sealing wall of an LNG cargo hold, and more particularly, for manufacturing a sealing wall of an LNG cargo hold by welding a plurality of sealing members made of metal plates to produce a sealing wall installed on the inner wall of an LNG cargo hold It relates to welding equipment.

In general, liquefied natural gas (LNG) is liquefied natural gas, which is one of fossil fuels, and such liquefied natural gas may be stored in an LNG cargo hold at a cryogenic temperature of -162°C.

Here, the LNG cargo hold may be formed of a land storage tank installed on the ground or buried underground, or a mobile storage tank installed in a transportation means such as a vehicle or a ship, depending on the installation location.

At this time, the liquefied natural gas has a risk of explosion when exposed to impact, and since it is stored in a cryogenic state, the cargo hold for storing the liquefied natural gas may have a structure in which impact resistance and liquid tightness are firmly maintained.

1 illustrates an example of a barrier structure of an LNG cargo hold.

Referring to Figure 1, the inner peripheral wall surface of the LNG cargo hold is sealed in a liquid-tight state by the sealing wall. That is, the sealing wall forms a single storage space by integrally connecting a plurality of sealing members formed of a metal plate to each other by welding, thereby enabling storage and transportation of liquefied natural gas without leakage.

At this time, the sealing member may be formed of a first sealing member in the form of a square plate, and a second sealing member formed in the shape of a rectangular plate and having wrinkles formed at predetermined intervals on the upper surface, and the wrinkles formed in the second sealing member are liquefied natural gas. It can be stretched or contracted by the temperature change according to the loading of the product to prevent damage due to thermal deformation applied to the sealing wall.

In addition, since the sealing wall is installed in a double structure, it is possible to completely seal the liquefied natural gas from leaking out.

Meanwhile, in the related art, in the process of installing the sealing wall in the LNG cargo hold, a worker enters the cargo hold and welds a plurality of sealing members that become the material of the sealing wall using a welding machine, thereby installing the sealing wall on the inner wall of the cargo hold.

However, the welding operation of the sealing wall requires a worker to individually connect each sealing member through welding, thereby greatly increasing the amount of work and greatly increasing the work time, thereby reducing the efficiency of the work.

Registered Patent No. 10-0644217 (Registration date: Nov. 2, 2006) "Liquefied natural gas storage tank with improved insulation structure and manufacturing method therefor"

In the present invention, a welding device for manufacturing a sealing wall of an LNG cargo hold, specifically, a plurality of sealing members made of metal plates can be welded to produce a modular assembly of a predetermined size, thereby increasing welding reliability and greatly improving work convenience. It is intended to provide a welding device for manufacturing the sealing wall of an LNG cargo hold.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

In order to solve the above problems, the present invention provides a welding frame on which a plurality of sealing members to be welded to each other are seated, and a torch part having a welding torch for welding a connection portion between a plurality of sealing members seated on the welding frame. , a transport crane that transports the torch in the XYZ axis direction from the upper part of the welding frame, a welding jig and a transport crane provided in the torch part to press and fix the connection part between the sealing members to be welded and guide the welding direction of the welding torch; It is provided between the torch unit, and provides a welding apparatus for manufacturing a sealing wall of an LNG cargo hold including a rotating unit for rotating the torch unit and the welding jig.

In addition, the welding jig is provided at the lower part of the jig frame and the jig frame movably coupled to the torch unit to press and fix the connection part between the sealing member to be welded, and a guide slit into which the end of the welding torch is inserted along the longitudinal direction. It provides a welding device for manufacturing the sealing wall of the LNG cargo hold including the jig member is formed.

In addition, when the welding torch presses and fixes the connection portion between the sealing members to be welded by the jig member, the welding device moves along the guide slit and welds the connection portion between the sealing members.

In addition, the torch unit provides a welding device for manufacturing the sealing wall of the LNG cargo hold including a tip guide member for movably fixing the end of the welding torch inserted into the guide slit to the jig member.

In addition, the jig member provides a welding device for manufacturing the sealing wall of the LNG cargo hold formed of a copper material to cool the welding heat generated during the welding process of the sealing member.

In addition, the rotating part provides a welding apparatus for manufacturing a sealing wall of an LNG cargo hold that rotates the torch part and the welding jig so that the welding jig can be disposed in a direction corresponding to the connection part between the sealing members to be welded.

In addition, the transfer crane is arranged so as to cross the upper portion of the welding frame, the X-axis transfer member for transporting the torch part and the welding jig in the width direction of the welding frame, is vertically disposed on both sides of the welding frame, the X-axis transfer member A welding device for manufacturing a sealing wall of an LNG cargo hold including a Z-axis transport member that transports in the vertical direction and a Y-axis transport member that supports the lower part of the Z-axis transport member and transports the Z-axis transport member in the longitudinal direction of the welding frame. to provide.

In addition, the welding frame provides a welding device for manufacturing a sealing wall of an LNG cargo hold in which a gas flow groove is formed in which an inert gas is injected and flows in a portion where a connection portion between a plurality of sealing members is disposed.

The welding apparatus for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention rotates and transports a torch part and a welding jig at the upper part of a welding frame, and presses the connection portion between the sealing member seated on the welding frame through the welding jig Then, by welding the connecting portion between the sealing members while moving the torch along the welding jig, the welding operation can be performed precisely and neatly, thereby increasing the quality and productivity of the manufactured sealing wall product.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

1 illustrates an example of a barrier structure of an LNG cargo hold.
2 is a view showing the overall configuration of a welding apparatus for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention.
3 is a front view showing a welding apparatus for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention.
4 shows the configuration of a welding frame according to an embodiment of the present invention.
5 is a cross-sectional view illustrating welding of a sealing member seated on a welding frame through a welding torch according to an embodiment of the present invention.
6 to 8 are diagrams illustrating a process of welding a plurality of sealing members using a welding apparatus for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION The detailed description set forth below in conjunction with the appended drawings is intended to describe exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

In order to clearly explain the present invention in the drawings, parts not related to the description may be omitted, and the same reference numerals may be used for the same or similar components throughout the specification.

In an embodiment of the present invention, expressions such as “or” and “at least one” may indicate one of the words listed together, or a combination of two or more.

2 shows the overall configuration of a welding apparatus 10 for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention, and FIG. 3 is welding for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention. The device 10 is shown in front view.

In addition, FIG. 4 shows the configuration of a welding frame 100 according to an embodiment of the present invention, and FIG. 5 is seated on the welding frame 100 through a welding torch 210 according to an embodiment of the present invention. The state of welding the sealing member (1) is shown in cross-sectional view.

The welding apparatus 10 for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention is a modular assembly of a preset size by welding a plurality of sealing members 1 constituting a sealing wall in an LNG cargo hold in advance. can be manufactured, it is possible to increase the product productivity of the sealing wall, and it can contribute to the increase of work convenience when installing the sealing wall in the LNG cargo hold.

2 to 5 , the welding apparatus 10 for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention includes a welding frame 100 , a torch unit 200 , a transfer crane 300 , and welding. It may include a jig 400 and a rotating part 500 .

The welding frame 100 may be seated in a predetermined arrangement on the upper surface of the plurality of sealing members 1 to be welded.

Here, the sealing member 1 is a unit configuration of a sealing wall installed in the LNG cargo hold, and includes a first sealing member 1a in the form of a rectangular plate, and a second sealing member 1a in the shape of a rectangular plate and having corrugations formed at predetermined intervals on the upper surface. It may be made of a sealing member (1b).

These first and second sealing members 1a and 1b may be formed of a steel material such as stainless steel or invar steel, and are welded to each other in a predetermined pattern and installed inside the LNG cargo hold as a sealing wall in the form of a storage space. can be formed.

At this time, in this embodiment, a plurality of first and second sealing members (1a, 1b) are welded into a modular assembly of a preset size and manufactured, so that when constructing a sealing wall in an LNG cargo hold, a module manufactured on site The sealing wall can be easily constructed using the mold assembly.

Specifically, the welding frame 100 is formed as a rectangular plate body, and a plurality of first and second sealing members 1a and 1b may be seated in a predetermined arrangement thereon. On the upper surface of the welding frame 100 , the first A first seating part 110 on which the sealing member 1a is mounted and a second seating part 120 on which the second sealing member 1b is mounted may be formed.

As an example, referring to FIG. 4 , in this embodiment, the second seating part 120 is formed in the horizontal direction at one end of the upper surface of the welding frame 100 , and the second seating part 120 in the vertical direction at the center of the upper surface. ) may be formed, and the second seating portion 120 may be formed in an area corresponding to the second sealing member 1b.

In addition, two first seating parts 110 may be formed on both sides of the second seating part 120 formed in the longitudinal direction in the center of the upper surface of the welding frame 100, and each of the first seating parts ( 110 may be formed in an area corresponding to the first sealing member 1a.

Here, when the second sealing member 1b is seated on the upper surface of the second seating part 120, a pleat insertion groove 121 into which the wrinkle part of the second sealing member 1b is inserted correspondingly may be formed, Through this, the second sealing member 1b seated on the second seating part 120 may be fixed in a fixed position.

In addition, an alignment roller 111 capable of aligning the first sealing member 1a to be seated on the upper surface of the first seating part 110 may be provided, and the alignment roller 111 is the first sealing member When (1a) is displaced on the first seating part 110, it can be rotated by driving a motor to move the first sealing member 1a to the original position.

That is, the alignment roller 111 provided in the first seating part 110 is such that the end of the first sealing member 1a is in close contact with the end of the second sealing member 1b seated in the second seating part 120 . The first sealing member 1a may be aligned.

Accordingly, in the present embodiment, the four first sealing members 1a and the two second sealing members 1b may be seated in a predetermined arrangement on the upper surface of the welding frame 100 .

The torch unit 200 may weld a plurality of sealing members 1 seated on the welding frame 100 .

Specifically, the torch unit 200 is provided with a welding torch 210 at a lower portion, and the connection portion 2 between the plurality of sealing members seated on the welding frame 100 can be welded through the welding torch 210 . .

In addition, a tip guide member 220 for fixing the end of the welding torch 210 may be provided at a lower portion of the torch unit 200 , a detailed description thereof will be given later.

The transfer crane 300 may transfer the torch unit 200 in the XYZ axis direction from the upper part of the welding frame 100 .

Specifically, the transfer crane 300 transfers the X-axis transfer member 310 for transferring the torch unit 200 in the width direction of the welding frame 100 , and the torch unit 200 in the longitudinal direction of the welding frame 100 . It may include a Y-axis transfer member 330 and a Z-axis transfer member 320 for transferring the torch unit 200 in the vertical direction.

As an example, the X-axis transfer member 310 includes a first guide frame 311 disposed to cross the upper portion of the welding frame 100 in the width direction, and a torch portion ( 200) may include a first driving means 312 for transporting in the left and right directions.

Here, the first driving means 312 may be provided connected between the torch unit 200 and the first guide frame 311, and the driving motor, the pinion gear coupled to the shaft of the driving motor, and the first guide frame ( 311), including a rack gear meshing with the pinion gear, and the like, rotate the pinion gear through a driving motor to transport the torch unit 200 in the left and right directions along the rack gear of the first guide frame 311. have.

In addition, the Z-axis transfer member 320 is a pair of second guide frames 321 disposed perpendicular to both sides of the welding frame 100, and the X-axis transfer member 310 along the second guide frame 321 . It may include a second driving means 322 for transferring in the vertical direction.

In addition, the Y-axis transfer member 330 is provided at the lower portion of the pair of second guide frames 321 to support the transfer of the pair of second guide frames 321 in the longitudinal direction of the welding frame 100 . A pair of third guide frames 331 and a third driving means 332 for transferring the Z-axis transfer member 320 in the front and rear directions along the third guide frame 331 may be included.

At this time, the second driving means 322 and the third driving means 332 may also have the same drive motor and rack/pinion structure as the first driving means 312 , and through this, the X-axis transfer member 310 can be moved up and down. direction, and the Z-axis transfer member 320 may be transferred in the front-rear direction.

In addition, the above-described first to third driving means (312, 322, 332), in addition to the drive motor and the rack / pinion structure, by using a drive motor and a belt structure or a cylinder transfer structure, etc., the torch unit 200 X-axis, Y-axis and It is obvious that various structures that can be transported in the Z-axis direction can be applied.

The welding jig 400 is provided in the torch unit 200 to press and fix the connection part 2 between the sealing members to be welded in the sealing member 1 disposed on the welding frame 100, and the welding torch 210 ) can guide the welding direction.

Such a welding jig 400 is formed in the shape of a square frame, the upper part is guide-coupled to the torch part 200, and the lower part can be fixed by pressing the connection part 2 between the sealing members to be welded.

Specifically, the welding jig 400 includes a jig frame 410 that is movably guide-coupled to the torch unit 200 and a connection portion 2 between the sealing member to be welded and provided at the lower portion of the jig frame 410 . It may include a jig member 420 in which a guide slit 421 into which the end of the welding torch 210 is inserted is formed along the length direction and fixed by pressing.

Here, the jig frame 410 has a rail 411 formed on the frame formed in the longitudinal direction of the upper side, and may be movably coupled to the torch unit 200 through the rail 411 .

In addition, the jig member 420 provided under the jig frame 410 may be formed of a metal material, and when the sealing member 1 is welded using the welding torch 210, a connection portion between the sealing members to be welded. (2) can be fixed by pressing, preferably, it may be formed of a copper material so that the welding heat generated in the welding process of the sealing member 1 can be cooled quickly.

In addition, the guide slit 421 formed along the longitudinal direction of the jig member 420 may be formed to penetrate vertically, and the end of the welding torch 210 provided under the torch unit 200 may be inserted. have.

In addition, a tip guide member 220 for movably fixing the end of the welding torch 210 to the jig member 420 may be provided at a lower portion of the torch unit 200 .

That is, the tip guide member 220 is connected to the lower portion of the torch unit 200 and is provided to be movable along the longitudinal direction on the upper surface of the jig member 420 through the wheel 221 provided on the bottom surface, The end of the welding torch 210 inserted into the guide slit 421 of the jig member 420 may be fixed.

Accordingly, in a state in which the sealing member 1 is pressed and fixed with the jig member 420 of the welding jig 400 for welding the sealing member 1, the torch unit 200 is the rail of the jig frame 410 ( 411), the welding torch 210 and the tip guide member 220 provided in the lower part of the torch unit 200 can move along the jig member 420, and the welding torch 210 has an end It moves along the jig member 420 while being inserted into the guide slit 421 , and the tip guide member 220 can move along the jig member 420 while fixing the end of the welding torch 210 without shaking.

On the other hand, the rotating unit 500 is provided between the transfer crane 300 and the torch unit 200, the torch unit 200 and the welding jig 400 in the X-axis transfer member 310 of the transfer crane 300. can be rotated together.

That is, the rotating unit 500 may be provided in a connection portion between the X-axis transfer member 310 and the torch unit 200, and by rotating the torch unit 200 at a preset angle through motor driving, the torch unit The welding jig 400 guide-coupled to 200 and the torch unit 200 may be rotated at a preset angle.

As an example, in this embodiment, the torch unit 200 and the welding jig 400 are rotated at an angle of 90° through the rotating unit 500 to weld the connecting portion 2 between the plurality of sealing members made of a square plate body. can be rotated

Specifically, in welding the sealing member 1 seated on the welding frame 100 through the torch unit 200 and the welding jig 400, the X-axis transfer member 310 and the Y-axis transfer member 330 are After moving the torch unit 200 to the upper portion of the welding frame 100 through the Z-axis transfer member 320 to lower the torch unit 200 and the welding jig 400, The connection portion 2 between the sealing members seated on the welding frame 100 can be fixed by pressing the jig member 420 .

At this time, before the torch unit 200 and the welding jig 400 are lowered, the jig member 420 may be disposed in a direction corresponding to the connecting portion 2 between the sealing member to be welded, the rotating unit 500 . Through this, the torch unit 200 and the welding jig 400 can be rotated.

As an example, in the case of welding the connecting portion 2 between the sealing members disposed in the vertical direction, the torch unit 200 and the welding jig 400 are rotated through the rotating unit 500 to rotate the welding jig 400 . It can be placed vertically.

At this time, by driving the transfer crane 300, the welding torch 210 of the torch unit 200 can be moved along the guide slit 421 of the jig member 420, and the welding torch 210 is tip-guided. While moving along the guide slit 421 in a fixed state by the member 220, it is possible to precisely weld the connection portion 2 between the sealing members by spraying a flame.

Also, referring to FIG. 5 , a gas flow groove 130 through which an inert gas flows may be formed in a portion of the welding frame 100 in which the connecting portion 2 between the sealing members is disposed.

That is, while the welding torch 210 welds the connecting portion 2 between the sealing members, an inert gas such as argon gas is supplied to and flows into the gas flow groove 130 of the welding frame 100, and the sealing is welded through this. It is possible to stabilize the connection portion 2 between the members.

In this way, the welding apparatus 10 for manufacturing the sealing wall of the LNG cargo hold according to this embodiment rotates and transfers the torch unit 200 and the welding jig 400 at the upper part of the welding frame 100, and the welding jig ( 400) by pressing and fixing the connection part 2 between the sealing members seated on the welding frame 100, and then moving the torch part 200 along the welding jig 400 and the connection part 2 between the sealing members. By welding, the welding reliability can be improved, and the working productivity of the modular assembly manufactured by welding the sealing member 1 can be improved.

Meanwhile, in the following, a process of manufacturing a modular assembly in which a plurality of sealing members 1 are welded by using the welding apparatus 10 for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention will be described in detail. .

6 to 8 are diagrams illustrating a process of welding a plurality of sealing members 1 using a welding device 10 for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention.

As an example, in this embodiment, after welding the connecting portion 2 between the sealing members disposed in the horizontal direction in the welding frame 100 through the torch unit 200, the connecting portion between the sealing members disposed in the vertical direction ( An example of welding 2) will be described.

Referring to FIG. 6 , in the process of welding the plurality of sealing members 1 using the welding device 10 for manufacturing the sealing wall of the LNG cargo hold according to the present embodiment, first, a welding frame 100 disposed on a workbench, etc. The plurality of sealing members 1 may be seated in a predetermined arrangement.

Here, as in FIG. 4 described above, the first sealing member 1a is seated on the first seating portion 110 of the welding frame 100 , and the second sealing member having a wrinkle portion formed on the second seating portion 120 . (1b) may be seated, the wrinkle portion of the second sealing member 1b may be inserted and fixed in the pleat insertion groove 121 of the second seating portion 120, and the alignment of the first seating portion 110 Through the roller 111, the end of the first sealing member (1a) may be aligned so as to be in close contact with the end of the second sealing member (1b).

In this way, when the plurality of sealing members 1 are arranged and arranged in the welding frame 100, the jig member 420 at the bottom of the welding jig 400 corresponds to the connection portion 2 between the sealing members to be welded. The torch unit 200 and the welding jig 400 may be moved to the upper part of the welding frame 100 through the transfer crane 300 to be disposed.

At this time, according to the direction of the connection part 2 between the sealing members to be welded, the torch part 200 and the welding jig part 200 through the rotation part 500 so that the jig member 420 of the welding jig 400 can be disposed correspondingly. The jig 400 may be rotated.

Then, referring to FIG. 7 , the torch part 200 and the welding jig 400 are lowered through the transfer crane 300 and seated on the welding frame 100 by the jig member 420 at the bottom of the welding jig 400 . It can be fixed by pressing the connecting portion (2) between the sealing members.

In addition, by driving the transfer crane 300 to move the torch unit 200 along the rail 411 at the top of the welding jig 400, the welding torch 210 at the bottom of the torch unit 200 is moved to the jig member 420. It can be moved along the guide slit 421 of the.

In this process, the welding torch 210 of the torch unit 200 moves along the guide slit 421 by the tip guide member 220 while spraying a flame, and the connection between the sealing members fixed by the jig member 420 . The part 2 can be precisely welded.

In addition, while the welding torch 210 welds the connecting portion 2 between the sealing members, an inert gas such as argon gas is supplied to the gas flow groove 130 (refer to FIG. 5 ) formed in the welding frame 100 to perform welding. It is possible to stabilize the connection portion 2 between the sealing members.

On the other hand, after the welding of the sealing member 1 through the welding torch 210 is completed, the welding frame by transferring the torch unit 200 and the welding jig 400 through the transfer crane 300 in the same manner as described above. In ( 100 ), the connection portion ( 2 ) between the sealing members disposed at different positions may be welded.

In addition, referring to FIG. 8 , in the case of welding the connecting portion 2 between the sealing members disposed in the longitudinal direction in the welding frame 100 through the torch unit 200 , the torch unit ( 200) and the welding jig 400 can be rotated, so that the welding jig 400 can be arranged in the vertical direction, and the connection portion between the sealing members through the jig member 420 of the welding jig 400 arranged in the vertical direction ( After fixing 2), the welding operation may be performed through the torch unit 200 in the same process as described above.

As described above, in the welding apparatus 10 for manufacturing a sealing wall of an LNG cargo hold according to an embodiment of the present invention, the torch unit 200 and the welding jig 400 are rotated and transported from the upper part of the welding frame 100 . Then, the connection part 2 between the sealing members seated on the welding frame 100 is pressed and fixed through the welding jig 400, and then the torch part 200 is moved along the welding jig 400, and the connection between the sealing members By welding the portion 2, a welding operation can be performed precisely and neatly, thereby increasing the quality and productivity of the manufactured sealing wall product.

Embodiments of the present invention disclosed in the present specification and drawings are merely provided for specific examples in order to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention.

Therefore, the scope of the present invention should be construed as including all changes or modifications derived based on the technical idea of the present invention in addition to the embodiments disclosed herein are included in the scope of the present invention.

10: Welding device for manufacturing sealing wall of LNG cargo hold
100: welding frame 200: torch part
210: welding torch 220: tip guide member
300: transfer crane 240: sensor member
300: transfer crane 310: X-axis transfer member
320: Z-axis transfer member 330: Y-axis transfer member
400: welding jig 410: jig frame
420: jig member 500: rotating part

Claims (8)

a welding frame on which a plurality of sealing members to be welded to each other are seated;
an alignment roller provided on the welding frame and arranged to align the seated plurality of sealing members;
a torch unit having a welding torch for welding a connection portion between a plurality of sealing members seated on the welding frame;
a transfer crane for transferring the torch unit in the XYZ axis direction from the upper portion of the welding frame;
a welding jig provided in the torch unit to press and fix a connection portion between sealing members to be welded and guide a welding direction of the welding torch;
It is provided between the transfer crane and the torch part, and includes a rotating part for rotating the torch part and the welding jig,
The welding jig, the rail is formed in the longitudinal direction, the jig frame movably coupled to the torch portion through the rail; and a jig member provided at the lower portion of the jig frame to press and fix the connection portion between the sealing members to be welded, and to penetrate in the longitudinal direction to form a guide slit into which the end of the welding torch is inserted,
When welding the connection part between the sealing members, the torch part and the welding jig are rotated through the rotating part so as to be disposed in a direction corresponding to the connection part between the sealing members, and the torch part and the welding jig are rotated through the transfer crane. A welding device for manufacturing a sealing wall of an LNG cargo hold, which lowers a welding jig and presses and fixes the connection portion between the sealing members with the jig member, and then moves the welding torch along the guide slit to weld the connection portion between the sealing members.
delete delete The method of claim 1,
The torch unit,
A welding apparatus for manufacturing a sealing wall of an LNG cargo hold comprising a tip guide member for movably fixing the end of the welding torch inserted into the guide slit to the jig member.
The method of claim 1,
The jig member is
A welding device for manufacturing a sealing wall of an LNG cargo hold formed of a copper material to cool the welding heat generated during the welding process of the sealing member.
The method of claim 1,
The plurality of sealing members include a first sealing member in the form of a square plate, and a second sealing member formed in the shape of a rectangular plate and having wrinkle portions formed on one surface at predetermined intervals,
The welding frame includes a first seating part on which the first sealing member is seated, and a second seating part on which the second sealing member is seated and a wrinkle insertion groove into which the wrinkle part is inserted correspondingly is formed,
The alignment roller is provided in the first seating part and the second seating part, and rotates by a motor driving to align the ends of the first and second sealing members so that the ends of the first and second sealing members are in close contact with each other. Device.
The method of claim 1,
The transfer crane is
an X-axis transfer member disposed to cross the upper portion of the welding frame and configured to transport the torch unit and the welding jig in the width direction of the welding frame;
a Z-axis transfer member disposed vertically on both sides of the welding frame to transport the X-axis transfer member in an up-down direction; and
A welding apparatus for manufacturing a sealing wall of an LNG cargo hold supporting a lower portion of the Z-axis transport member and comprising a Y-axis transport member for transporting the Z-axis transport member in the longitudinal direction of the welding frame.
The method of claim 1,
The welding frame is
A welding apparatus for manufacturing a sealing wall of an LNG cargo hold in which a gas flow groove through which an inert gas is injected and flows is formed in a portion where a connection portion between the plurality of sealing members is disposed.

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