KR101336226B1 - Unit Material Used in Manufacturing Liquid Cargo Tank, Liquid Cargo Tank, Ship Manufactured by the Same and Its Manufacturing Method - Google Patents

Abstract

A unit material for manufacturing a liquefied storage tank, a liquefied storage tank manufactured by using the same, a vessel provided with the liquefied storage tank, and a manufacturing method thereof are disclosed.
Unit material for manufacturing a liquefied storage tank according to an embodiment of the present invention, the inner wall portion of the liquefied storage tank which is provided with a plurality of connected to each other is provided in the ship, the first opening area having a predetermined length in some And a plurality of outer walls connected to each other to form an outer wall of the liquefied storage tank, and spaced apart from each other between the inner wall and the outer wall, and supporting the inner wall and the outer wall. And a reinforcing part formed at one side of a support groove and a coupling groove corresponding to the support part so as to be fitted to the support part through the first opening area.
Method for manufacturing a liquefied storage tank according to an embodiment of the present invention, a plurality of connected to each other to form an inner wall of the liquefied storage tank provided in the ship, the inner wall portion formed with a first opening area having a predetermined length in part; A plurality of supporting parts connected to each other to form an outer wall of the liquefied storage tank and spaced apart from each other between the inner wall part and the outer wall part and supporting the inner wall part and the outer wall part; Manufacturing a semi-finished unit member including a; and inserting a reinforcing part corresponding to the support part into a reinforcing part formed at one side thereof so that the coupling groove is fitted into the support part, and fixing the support part and the reinforcing part. Preparing a unit material for manufacturing a liquefied storage tank, and storing the liquefied material by connecting the unit materials to each other in the lateral and longitudinal directions And a step of making the size of the body.

Description

Unit material used in manufacturing liquid cargo tank, liquid cargo tank, ship manufactured by the same and its manufacturing method}

The present invention relates to a unit material for manufacturing a liquefied storage tank, a liquefied storage tank manufactured by using the same and a vessel equipped with the liquefied storage tank, and a manufacturing method thereof, and more particularly, a liquefied storage tank has a rigid strength. Unit material for manufacturing a liquefied storage tank, and a vessel equipped with a liquefied storage tank and the liquefied storage tank and the manufacturing method for using the same.

In general, liquefied liquids such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), crude oil (crude oil), etc. are often transported to the sea by various ships or offshore structures including structures such as FPSO. In particular, the liquefaction is carried in a state accommodated in various types of storage tank to be sealed and warmed to a predetermined pressure.

On the other hand, in the case of transporting liquefied to such various storage tanks, there are many situations in which liquefied liquid leaks to the outside of the storage tank due to various causes, such as damage or damage to the storage tank. Accordingly, liquefied storage tanks are required to be of high strength, and generally have a dual structure in case of liquefied leakage.

1 shows a cross section of a vessel 100 equipped with an IMO type A storage tank. Such IMOtype A storage tank is representative of AKER's ADBT (Aluminum Double Barrier Tank), as shown in Figure 1 is a liquid consisting of a double structure of the outer wall 130 and the inner wall 110 inside the hull (S) Storage tanks are installed.

Since the dual structure is formed in this way, even when the liquid liquefied inside the outer wall 110, there is an advantage that does not leak to the hull (S) side by the outer wall 130.

In addition, the space between the outer wall 130 and the inner wall 110 is provided with a support member 120 for supporting the outer wall 130 and the inner wall 110, respectively, the outer wall 130 and the hull (S) is also a separate supporting means Supported by 140.

On the other hand, Figure 2 and Figure 3 shows the process of manufacturing such a liquefied storage tank in the prior art. As shown, the outer wall and the inner wall of the liquefied storage tank is welded to the H-shaped member 200 consisting of the outer wall portion 230, the inner wall portion 210, the support portion 220 in the lateral direction and the front and rear directions, respectively. Is done.

At this time, since it is difficult to ensure sufficient strength of the storage tank only by the structure in which the H-shaped member 200 is connected side by side, the reinforcing member 240 generally called a web (web) is laterally lateral of the H-shaped member 200. It is often installed in the direction.

However, as described above, since the conventional method of connecting the H-shaped member 200 without gaps when manufacturing the storage tank is used, the reinforcing member 240 has a problem that it is difficult to weld to the outer wall of the storage tank.

In order to solve such a problem, Korean Laid-Open Patent Publication No. 10-2009-7018968 discloses a method of installing the extruded material in a transverse direction, but this requires an additional device such as a bracket, and its structure is complicated, so that the manufacturing cost and manufacturing There is a problem that the time required is increased.

Therefore, a method for overcoming the above problems is required.

Embodiments of the present invention are provided with a reinforcing part fitted to a support part through a first opening area formed between inner wall parts, so that the manufactured liquefied storage tank can have a firm strength.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, a unit member for manufacturing a liquefied storage tank includes a plurality of inner walls of the liquefied storage tank which are connected to each other and provided in the ship, and part of which has a first opening area having a predetermined length. And a plurality of outer walls connected to each other to form an outer wall of the liquefied storage tank, and spaced apart from each other between the inner wall and the outer wall, and supporting the inner wall and the outer wall. The support part may include a reinforcement part formed at one side of a coupling groove corresponding to the support part so as to be fitted to the support part through the first opening area.

In addition, the length of the first opening region may be formed to correspond to the thickness of the reinforcing portion.

In addition, the length of the first opening region is formed longer than the thickness of the reinforcement portion, and when the reinforcement portion and the support portion is coupled to shield the remaining portion of the first opening region, the liquid storage tank together with the inner wall portion The cover unit may further include an inner wall.

In addition, an expansion hole having a diameter larger than the width of the coupling groove may be formed inside the coupling groove.

In addition, the reinforcement may be coupled to any one or more of both ends of the support.

In addition, a second opening region corresponding to the thickness of the reinforcing portion may be formed at a portion of the outer wall portion corresponding to the position of the reinforcing portion, so that the reinforcing portion may be inserted into the second opening region.

In addition, an alignment groove corresponding to the support part may be formed on one surface of the cover part.

The present invention may be a liquefaction storage tank manufactured by using the unit material for manufacturing the liquefaction storage tank.

In addition, the present invention may be a vessel provided with a liquefaction storage tank manufactured by using the unit material for manufacturing the liquefaction storage tank.

And, according to one aspect, the liquefied storage tank and the vessel manufacturing method having the same according to the present invention, a plurality of the first is connected to each other to form an inner wall of the liquefied storage tank provided in the vessel, the first portion having a predetermined length An inner wall portion having an opening region, a plurality of outer walls connected to each other to form an outer wall of the liquefied storage tank, and spaced apart from each other between the inner wall portion and the outer wall portion, wherein the inner wall portion and the outer wall are provided. Manufacturing a semi-finished unit member including a plurality of support parts supporting the parts, and inserting a reinforcing part formed at one side of a coupling groove corresponding to the support part to the first opening area so that the coupling groove is fitted into the support part; Fixing the support part and the reinforcement part to manufacture a unit material for manufacturing a liquefied storage tank, and the unit material in a horizontal direction and a longitudinal direction By connecting to each other it may comprise a step of manufacturing a body of liquefied product storage tanks.

The manufacturing of the semi-finished unit material may include forming the inner wall portion, the outer wall portion, and the support portion by connecting a plurality of H-shaped members in a lateral direction, and forming a first opening region on the inner wall portion. It may include.

In addition, after the forming of the inner wall portion, the outer wall portion and the support portion, a step of forming a second opening area corresponding to the thickness of the reinforcement portion in the portion corresponding to the position of the reinforcement portion of the outer wall portion further includes Can be.

In the manufacturing of the unit member, the reinforcing part may be inserted into the first opening area and the second opening area, and the support part and the reinforcing part may be fixed.

In the manufacturing of the unit member, the reinforcing part may be fixed by welding the parts in contact with the inner wall part, the outer wall part, and the support part, respectively.

In addition, the step of manufacturing the body of the liquefied storage tank, welding the parts in contact with each other between the unit material, to secure a non-welding section of a predetermined length between the portion of the inner wall portion and the outer wall portion welded and the portion of the support portion welded. Welding can be performed.

In addition, the first opening area is formed longer than the thickness of the reinforcing portion, the step of manufacturing the unit member, the process of fixing the support and the reinforcement portion, the cover portion for shielding the remaining portion of the first opening region is coupled It may include the process of doing.

The manufacturing of the unit member may further include fixing the reinforcement parts to both ends of the semi-finished unit member.

In addition, the present invention may be a ship manufacturing method comprising the step of installing the liquefied storage tank manufactured by the liquefied storage tank manufacturing method on the hull.

Embodiments of the present invention, since the reinforcing portion is directly fitted to the support portion through the first opening region formed between the inner wall portion, there is an advantage that the manufactured liquefied storage tank can have a solid strength.

In addition, since the cover portion may further be provided to shield the first opening area according to the length of the first opening area, there is an advantage that the convenience of the operator can be increased when manufacturing the liquefied storage tank.

In addition, there is an advantage that the unit price is cheap when manufacturing.

In addition, since the unit material can be manufactured in various ways, there is an advantage that an appropriate method can be selected according to the working situation.

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

1 is a cross-sectional view showing a ship equipped with an IMO type A storage tank;
Figure 2 is a perspective view showing a state in which the H-shaped member is connected to each other in the conventional storage tank manufacturing process;
Figure 3 is a perspective view showing the installation state of the reinforcing member in the conventional storage tank manufacturing process;
Figure 4 is a perspective view showing the state of each part constituting the unit material for producing a liquefied storage tank according to an embodiment of the present invention;
5 is a perspective view showing a state in which each part is connected in the unit material for manufacturing a liquefied storage tank according to an embodiment of the present invention;
FIG. 6 is a perspective view illustrating a state in which a cover part is coupled to a first opening area in a unit material for manufacturing a liquefied storage tank according to an embodiment of the present invention; FIG.
FIG. 7 is a perspective view illustrating a reinforcing part connected to an end of a support part in a unit material for manufacturing a liquefied storage tank according to an exemplary embodiment of the present invention; FIG. And
8 is a cross-sectional view showing the connection between the unit material for manufacturing a liquefied storage tank according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

First, the liquid cargo storage tank described in each embodiment of the present invention can be loaded on a variety of navigational, anchoring vessels or various offshore structures, including carriers. In addition, the term "ship" in the present specification includes the various ships and offshore structures.

4, in the unit material for manufacturing a liquefied storage tank according to an embodiment of the present invention, each of the components used in the manufacture of the liquefied storage tank is shown.

As shown, the unit material for manufacturing a liquefied storage tank according to an embodiment of the present invention, the inner wall of the liquefied storage tank forms an inner wall portion 10 in which a first opening area P ₁ of a predetermined length is formed. ), An outer wall portion 30 forming an outer wall, a support portion 20 supporting between the inner wall portion 10 and the outer wall portion 30, a reinforcement portion 40 fitted to the support portion 20, and The cover part 50 which shields one opening area P ₁ is included. Hereinafter, each of these will be described in detail.

First, a plurality of inner wall portions 10 are connected to each other to form an inner wall of a liquefied storage tank provided in the vessel, and a portion of the inner wall portion 10 has a first opening region P ₁ having a predetermined length. That is, the inner wall portion 10 forms each surface of the inner receiving space of the liquefied storage tank to be produced later.

In addition, a plurality of outer wall portions 30 are also connected to each other, and forms the outer wall of the liquefied storage tank. In particular, since the outer wall is provided to surround the outer inner wall formed by the inner wall portion 10 may form a double structure of the liquefied storage tank.

In this case, the plurality of outer wall portions 30 may be connected to each other without having an opening region, unlike the inner wall portion 10, but may have an opening region like the inner wall portion 10. This will be described later.

Next, the support portion 20 is provided in a state in which a plurality of spaced apart between the inner wall formed by the inner wall portion 10 and the outer wall formed by the outer wall portion 30, respectively, the inner wall portion 10 and the outer wall portion 30 Are mutually supporting components. In general, the support unit 20 is provided to be orthogonal to the inner wall and the outer wall, and thus may provide a support force while securing a space between the outer wall and the inner wall.

Referring to the left side of FIG. 4, a structure formed by welding the inner wall member 10, the outer wall member 30, and the support member 20 to each other is illustrated. As illustrated, the inner wall portion 10 and the outer wall portion 30 are supported by the support portion 20, and in particular, each inner wall portion 10 has a first opening region P ₁ .

For reference, welding may be performed to connect and fix each component, and in particular, friction stir welding or MIG welding may be used.

On the other hand, the reinforcing portion 40 is formed with a coupling groove 42 on one side. In particular, the coupling groove 42 is formed in plural so that the support portion 20 corresponds to the spaced apart from each other, and has a length corresponding to the width of the support portion 20.

Referring to FIG. 5, a state in which such a reinforcement part 40 is coupled to the support part 20 is illustrated. As shown, it can be seen that the coupling groove 42 of the reinforcement portion 40 is fitted to the support portion 20 through the first opening region P ₁ formed between the inner wall portions 10.

As such, in the exemplary embodiment of the present invention, since the plurality of inner wall portions 10 are spaced apart from each other, the reinforcement portion 40 and the support portion 20 are firmly fixed to each other through the first opening region P ₁ . You can. Therefore, there is an advantage that the strength is greatly increased compared to the conventional method.

At this time, the expansion hole 44 having a diameter larger than the width of the coupling groove 42 may be further formed inside the coupling groove 42. This is to prevent the stress is concentrated inside the coupling groove 42 during processing. Of course, the expansion hole 44 may be omitted, but is preferably provided for the strength of the structure. Therefore, in the exemplary embodiment of the present invention, the expansion holes 44 are formed in each of the coupling grooves 42.

Meanwhile, the opened length of the first opening region P ₁ may be determined according to the situation. For example, when the opened length of the first opening region P ₁ is formed to correspond to the thickness of the reinforcing portion 40, the first reinforcing portion 40 is inserted into the first opening region P. The opening area P ₁ may be shielded only by the reinforcement part 40. Therefore, there is no need to perform additional work, and the reinforcement part 40 and the inner wall part 10 may be welded to fix the reinforcement part 40 and the inner wall part 10.

However, in such a case, there is a problem that a space for welding the reinforcement part 40 and the support part 20, the reinforcement part 40, and the outer wall part 30 is not secured. Therefore, it is desirable to secure a working space so that the first opening region P ₁ is sufficiently formed so that an operator can weld the reinforcement portion 40 and the support portion 20, the reinforcement portion 40, and the outer wall portion 30. something to do.

On the other hand, if the open length of the first opening region P ₁ is formed longer than the thickness of the reinforcing portion 40 in this way, even if the reinforcing portion 40 is sandwiched in the first opening region P ₁ . One opening area P ₁ will still be open.

Therefore, in one embodiment of the present invention, the cover unit 50 is further provided. In detail, the cover part 50 is formed to have a size capable of shielding the remaining part of the first opening region P ₁ after the reinforcing part 40 and the support part 20 are combined. That is, when the cover part 50 is coupled to the remaining portion of the first opening region P ₁ , the cover part 50 and the inner wall part 10 together form an inner wall of the liquefaction storage tank.

In this way, when the opened length of the first opening region P ₁ is formed to be longer than the thickness of the reinforcement portion 40, and the method of additionally coupling the cover portion 50 is used, the operator works as described above. There is an advantage that it is possible to secure enough space to facilitate welding.

In addition, an alignment groove corresponding to the support part 20 may be formed on one surface of the cover part 50. Therefore, the alignment groove of the cover part 50 can be precisely positioned on the support part 20 to allow for easier operation.

Meanwhile, as the first opening region P ₁ is formed in the inner wall portion 10, the outer wall portion 30 may also have the opened second opening region P ₂ .

Specifically, as shown in FIGS. 4 and 5, the second opening area P ₂ opened by the thickness of the reinforcing part 40 in the portion corresponding to the position of the reinforcing part 40 of the outer wall part 30. ) May be formed, and then the reinforcement part 40 may be inserted deeper to the second opening region P ₂ to perform welding. In this case, since the reinforcement part 40 may have a state in which the outer wall part 30, the support part 20, and the inner wall part 10 are all welded, a more rigid structure can be formed.

Referring to Figure 6, there is shown a unit material for manufacturing a liquefied storage tank produced by the above process. That is, the liquid storage tank can be manufactured by connecting such unit materials to each other.

In addition, the reinforcement part 40 may be coupled to any one or more of both ends of the support part 20 as well as the first opening region P ₁ . That is, when the reinforcing portion 40 is located at the corner of the liquefied storage tank, such a method can be used.

Referring to FIG. 7, it can be seen that the reinforcement part 40 is coupled to an end portion of the unit member in which the outer wall part 30, the support part 20, and the inner wall part 10 are coupled to each other. As such, the reinforcement part 40 may be connected to any one of both ends of the unit member.

In particular, in this case, since the position of the support part 20 can be confirmed through the coupling groove 42 of the reinforcement part 40, there is an advantage that the reinforcement part 40 can be connected to the unit member by welding at the correct position.

As described above, the liquefied storage tank unit material made of the inner wall portion 10, the support portion 20, the outer wall portion 30 and the reinforcement portion 40 can be connected to each other to produce a liquefied storage tank, and finally By installing the liquefied storage tank in a plurality of vessels can be stored and transported liquefied.

Meanwhile, the unit member including the inner wall portion 10, the support portion 20, the outer wall portion 30, and the reinforcement portion 40 may be manufactured by various methods. Specifically, the pair of members are spaced apart from each other, the inner wall portion 10 having the first opening region P ₁ , and the support portion 20 and the outer wall portion 30 formed of one member each formed integrally. And using the reinforcing portion 40, a method of welding each other may be used, as well as can be produced by a method of connecting the H-shaped members to each other.

Hereinafter, a method of manufacturing a liquefied storage tank according to an embodiment of the present invention using the H-shaped member in this way.

Method for manufacturing a liquefied storage tank according to an embodiment of the present invention, the step of manufacturing a semi-finished unit material largely, the manufacturing of a liquefied storage tank unit for manufacturing, and the step of manufacturing a body of the liquefied storage tank do.

The manufacturing of the semi-finished unit material is the step of forming the inner wall portion 10, the support portion 20, and the outer wall portion 30 as described above, before the reinforcing portion 40 is joined. That is, the semi-finished unit material is manufactured by combining the remaining parts except the reinforcement part 40.

In this case, as described above, the inner wall portion 10 is formed such that the pair of members are spaced apart from each other to have the first opening region P ₁ , and the support portion 20 and the outer wall portion 30 are integral with each other. When molded into a single member formed into them, they will be welded together to produce a semifinished unit piece. However, in the liquefaction storage tank manufacturing method according to an embodiment of the present invention to manufacture a semi-finished unit material using the H-shaped member.

Accordingly, the step of manufacturing the semi-finished unit member, the process of forming the inner wall portion 10, the outer wall portion 30 and the support portion 20 by connecting a plurality of H-shaped members in the transverse direction, and the inner wall portion 10 Forming a first opening region P ₁ therein.

That is, first, a plurality of H-shaped members are transversely welded to each other so that the semi-finished unit member has an appropriate width, so that the inner wall portion 10, the outer wall portion 30, and the support portion 20 are formed by the plurality of H-shaped members. To form.

Thereafter, a predetermined portion of the inner wall portion 10 is removed to form the first opening region P ₁ .

As a result, even in this case, the semi-finished unit member having the first opening region P ₁ formed on the inner wall portion 10 as a whole can be manufactured in the same form. As such, the semi-finished unit material can be manufactured by various methods in this step.

Next, in the step of manufacturing a unit material for manufacturing a liquefied storage tank, the coupling groove 42 is inserted into the first opening area (P ₁ ) by inserting the reinforcing portion 40 formed on one side of the coupling groove 42 is the support portion 20, the support 20 and the reinforcement 40 are fixed.

In this case, the first opening region P ₁ may be opened by the thickness of the reinforcement portion 40, or may be formed longer than the thickness of the reinforcement portion 40. In the former case, the first opening region P ₁ is shielded by the reinforcing portion 40, but the reinforcing portion 40 can be welded only to the inner wall portion 10. In the latter case, the first opening region P ₁ is shielded. It is necessary to provide a separate cover 50 for the shielding, but it has been described above that the working space for welding can be secured.

Particularly, in the latter case, the manufacturing of the unit member may include fixing the support 20 and the reinforcement 40 in more detail, and covering the remaining portion of the first opening P ₁ . It may include a process of combining.

At this time, the reinforcing portion 40 is preferably welded and firmly fixed to the entire wall contacting the inner wall portion 10, the outer wall portion 30, the support portion 20. Subsequently, the cover unit 50 may be positioned to shield the first opening area P ₁ , and welding may be completed to complete the unit material.

On the other hand, in the step of manufacturing the semi-finished unit material, after the process of forming the inner wall portion 10, the outer wall portion 30 and the support portion 20, when the reinforcement portion 40 is combined, the reinforcement of the outer wall portion 30 A process of forming a second opening area P ₂ corresponding to the thickness of the reinforcing part 40 may be further included in a portion corresponding to the position of the part 40.

In this case, the reinforcement part 40 may be inserted into the first opening area P ₁ and the second opening area P ₂ to fix the support part 20 and the reinforcement part 40. That is, the reinforcement part 40 may be more stably fixed by the second opening region P ₂ .

In this case, the welding of the reinforcement part 40 and the outer wall part 30 inserted into the second opening region P ₂ may be performed together with the welding of other parts, or may be performed in the final step of manufacturing the unit member.

The second opening region P ₂ may be formed as a pair of members are spaced apart from each other, similarly to the first opening region P ₁ , but may be made by removing a predetermined portion after the lateral connection of the H-shaped member. have.

In addition, as described above, the reinforcement part 40 may be fixed to both ends of the semi-finished unit material. That is, when the reinforcing portion 40 is located at the corner of the liquefied storage tank, this method may be used. In this case, since the position of the support part 20 can be confirmed through the coupling groove 42 of the reinforcement part 40, the reinforcement part 40 may be connected to the unit member by welding at the correct position.

Next, the step of manufacturing the body of the liquefied storage tank is performed by connecting the unit material produced as described above in the transverse direction and the longitudinal direction.

In this step, a liquefied storage tank in which a double structure of the outer wall and the inner wall is formed, and then it can be installed in the hull of the ship. Alternatively, the manufacture of the liquefied storage tank and the ship may be performed at the same time.

At this time, referring to Figure 8, it is shown a state of the process of connecting each unit material. As shown, the inner wall portion 10 of the left unit member and the inner wall portion 310 of the right unit member, the outer wall portion 30 of the left unit member, the outer wall portion 330 of the right unit member, the support unit 20 and the right side of the left unit member Welding between the support portions 320 of the unit material is performed.

In this case, a non-welding section V having a predetermined length may be formed between the weld portion W ₁ between the inner wall portions, the weld portion W ₃ between the outer wall portions, and the weld portion W ₂ between the support portions. That is, it is possible to intentionally form the non-welding section (V) during welding, which has the effect of preventing the progress to the opposite side when a crack occurs in the outer wall or inner wall. Therefore, overall life and durability can be improved.

In addition, such a welding method may be useful when the total length of the semifinished unit material is short.

In the above-described embodiment, the first opening region P ₁ is formed in the middle portion of the inner wall portion 10, but the length of the semi-finished unit member is shortened to a predetermined length or less according to a situation such as when the length of the H-shaped member is short. This is because, when formed, it may not be possible or suitable to form the first opening region P ₁ in the middle portion. In such a case, a pair of semifinished unit materials may be welded to each other to make a unit for manufacturing a liquefied storage tank.

Specifically, when the semi-finished unit member is manufactured, when the H-shaped member having a short length is used, or when the inner wall portion and the outer wall portion are formed by one member having a short length, the first opening region P _{1 is} formed on either side of the semi-finished unit member. After forming in one, it may be subjected to a process of welding with other semi-finished unit material that does not form the first opening region (P ₁ ).

As a result, by combining a pair of semi-finished unit material having a short length it can be produced in the same shape as the semi-finished unit material formed with the first opening region P ₁ in the middle portion as in the above-described embodiment.

In this case, however, there may be a problem in the strength of the entire semifinished unit. Therefore, when combining a pair of short semi-finished unit members, as shown in Figure 8, the cost of a predetermined length between the weld portion (W ₁ ) between the inner wall portion, the weld portion (W ₃ ) between the outer wall portion and the weld portion (W ₂ ) between the support portion By forming the contact section (V), it is possible to improve the life and durability of the entire semi-finished unit unit.

That is, in the manufacture of the liquefaction storage tank of the present invention, when the length of the member constituting the semifinished product unit material is short, as described above, a plurality of semifinished unit materials may be welded to produce one semifinished unit material.

As described above, according to the manufacturing method of the liquefaction storage tank of the present invention, the conventional liquid by the combination between the inner wall member 10, the support member 20, the outer wall member 30, the reinforcing member 40 and the cover member 50 It is possible to manufacture a liquid cargo storage tank having an improved strength compared to the cargo storage tank. In addition, it is easy to manufacture the reinforcing member 40 in the transverse direction, as well as easy to manufacture, there is an advantage that the manufacturing cost is also cheap.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

10: inner wall
20: Support
30: outer wall
40: reinforcement
42: coupling groove
44: expansion hole
50: cover part
P ₁ : first opening area
P ₂ : second opening area

Claims (18)

delete delete delete delete delete delete delete delete delete A plurality of pieces are connected to each other to form an inner wall of the liquefied storage tank provided in the ship, and a part of the inner wall portion having a first opening area having a predetermined length, and a plurality of connected to each other to form the outer wall of the liquefied storage tank Manufacturing a semi-finished unit member having an outer wall portion and a plurality of support portions provided spaced apart from each other between the inner wall portion and the outer wall portion to support the inner wall portion and the outer wall portion;
Manufacturing a unit material for manufacturing a liquefied storage tank by inserting a reinforcing part corresponding to the support part into the reinforcing part formed in one side of the first opening area so that the coupling groove is inserted into the support part and fixing the support part and the reinforcing part; ; And
Connecting the unit members to each other in the lateral and longitudinal directions to manufacture a body of a liquefied storage tank;
Including;
Producing the semi-finished unit material,
Connecting the plurality of H-shaped members in the lateral direction to form the inner wall portion, the outer wall portion, and the support portion; And
Forming a first opening area in the inner wall portion;
Liquid storage tank manufacturing method comprising a. delete The method of claim 10,
After the process of forming the inner wall portion, the outer wall portion and the support portion,
And forming a second opening area corresponding to the thickness of the reinforcing part in a portion of the outer wall part corresponding to the position of the reinforcing part. The method of claim 12,
Producing the unit member,
And inserting the reinforcing part into the first opening area and the second opening area, and fixing the support part and the reinforcing part. The method of claim 10,
Producing the unit member,
And the reinforcing portion welds and fixes portions of the inner wall portion, the outer wall portion, and the support portion to each other. The method of claim 10,
Producing the body of the liquefied storage tank,
Welding the parts in contact with each other between the unit members,
A method for manufacturing a liquefied storage tank for performing welding by securing a non-welding section of a predetermined length between a portion where the inner wall portion and the outer wall portion are welded and a portion where the support portion is welded. The method of claim 10,
The first opening area is formed longer than the thickness of the reinforcement,
Producing the unit member,
Fixing the support part and the reinforcement part; And
Coupling a cover part to shield the remaining portion of the first opening area;
Liquid storage tank manufacturing method comprising a. The method of claim 10,
Producing the unit member,
Method for manufacturing a liquefied storage tank further comprising the step of fixing the reinforcement to both ends of the semi-finished unit material. A ship manufacturing method comprising the step of installing a liquefied storage tank manufactured by the liquefied storage tank manufacturing method of any one of claims 10, and 12 to the hull.

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