KR20210124837A - Method on tandem of launching ship in dry-dock by using buoyancy structure-combined keel block having added buoyancy - Google Patents

Abstract

The present invention relates to a method for launching a dry dock tandem using a buoyancy structure-combined keel block having added buoyancy, comprising the following steps of: (S110) determining a buoyancy structure-combined keel block; (S120) performing a prior review of impact on a hull; (S130) placing the buoyancy structure-combined keel block on a dock; (S140) inspecting a lower side of the hull; (S150) attaching the buoyancy structure-combined keel block to the hull; (S160) generating added buoyancy; (S170) removing the buoyancy structure-combined keel block from the completely constructed ship; (S180) floating the constructed ship; (S190) taking out the completely constructed ship to the pier; and (S200) taking out a partially constructed ship to a dock gate. The present invention is able to use the buoyancy structure-combined keel block (110, 120) attached to the lower side of the hull to serve as the keel block for constructing a hull and to provide added buoyancy for floating the ship.

Description

Dry dock tandem launch method using a keel neck for a buoyancy body with additional buoyancy

The present invention can provide complete and stable additional buoyancy regardless of the buoyancy draft of a partially dry ship by attaching a keel neck to the lower part of the hull base, and at the same time to perform the role of a keel in the dry dock. , relates to a dry dock tandem launching method using a keel and pelvic neck for a buoyancy body with additional buoyancy.

In general, for the efficient construction of large ships, the dry dock method (dry dock method) is applied to perform ship construction. The ship blocks are built in the dry dock, seawater is introduced into the dry dock, the ship is lifted, and the ship is lifted to the quay wall. withdraw

Recently, a tandem method has been applied to simultaneously build a fully-docked launching vessel and a partially built-up vessel using the free space in the dry dock.

For example, when applying the tandem method of launching ships of extra-large container ships and partially launching ships of VLCCs, when seawater flows into the dry dock, the bulkheads of the partially launched ships are disproportionately inclined toward the end of the stern due to the buoyancy of the cargo tank area. When the tug is lifted, the part supporting the partially launched vessel is toppled by the screw rotation of the tug, and there is a possibility that the partially launched vessel is overturned. At the same time, there is a limit that it cannot be dried.

As a prior art for solving such a limitation, Korean Patent Registration No. 10-0681556 is disclosed. The conventional method for launching an additional buoyancy of a ship and an apparatus suitable therefor is, as shown in FIG. 1, an iron cage of a predetermined size. A buoyancy chamber (1) configured to accommodate an object having buoyancy inside in the form of a buoyancy chamber (1), a buoyancy body (2) accommodated in the buoyancy chamber (1) to generate buoyancy, and a buoyancy chamber (1) to a vessel (S) It is installed on the bottom and consists of a number of pillars (3) that are fixed by connecting the ship (S) and the buoyancy chamber (1) by welding or the like so that the buoyancy generated by the additional force acts on the ship in a balanced way, It enables the launching of short-length partially built ships and large blocks that do not form.

However, by connecting the vessel and the buoyancy chamber through a pillar of a certain length, only the role of providing buoyancy for launching or partial launching is performed, and the buoyancy body is removed from the vessel during additional construction of the partially dried vessel after withdrawal to the quay wall of the fully dried vessel. It has to be separated and a separate keel neck has to be installed in the dry dock, which complicates the drying process and reduces productivity.

Accordingly, by attaching the keel neck for the buoyancy body to the lower part of the base of the hull, it is possible to provide complete and stable additional buoyancy regardless of the buoyancy draft of the partially dry ship, and at the same time to perform the role of the half neck in the dry dock. skills are required

Korean Patent Publication No. 10-0681556 (Additional buoyancy launching method for ships and a device suitable therefor, 2007.02.09) Korean Patent Publication No. 10-0796410 (immersion method applied to tandem drying method) Korean Patent Publication No. 2012-0107587 (Shipbuilding method with shortened quay wall air)

The technical problem to be achieved by the idea of the present invention is to provide a complete and stable additional buoyancy force regardless of the buoyancy draft of a partially dry ship by attaching a keel bar neck for a buoyancy body to the lower part of the hull base, and at the same time, a keel bar in the dry dock It is to provide a dry dock tandem launching method using a keel neck for a buoyancy body with additional buoyancy, which can also perform the role of.

In order to achieve the above object, the present invention is a buoyancy body that performs the role of a buoyancy body and a buoyancy according to the weight and buoyancy of a partially built ship in a dry dock for building a plurality of same or heterogeneous ship blocks in one row or two rows determining the size of the combined keel neck and the fixed position of the lower part of the hull base; Before the keel mounting step of the partially dry ship, disposing the buoyancy body combined keel neck in the dry dock; Inspecting the lower part of the hull of the partially dry ship to which the buoyancy body combined use of the keel neck is attached; attaching the buoyancy body combined keel neck to the lower part of the hull base line of the partially built ship; generating additional buoyancy by pouring or draining ballast water to the keel and pelvic neck for the buoyancy body of the partially built ship when the fully dry ship is launched; Floating the fully dry ship and the partially dry ship by pouring water into the dry dock; withdrawing the completely dry ship from the dry dock to the quay wall; and withdrawing the partially dried vessel in the direction of the dock gate of the dry dock and draining it into the dry dock to sink the partially dried vessel into the dry dock and performing the remaining hull construction; including, with additional buoyancy We provide a dry dock tandem launching method using a keel neck for both buoyancy and buoyancy.

In addition, before the step of arranging the buoyancy combined keel neck in the dry dock, it may further include the step of pre-examining the effect on the hull of the buoyancy body combined keel neck when the buoyancy of the partially dry ship.

In addition, the buoyancy body combined keel neck is attached to the lower part of the hull base of the completely dry ship, and before watering in the dry dock, the step of removing the buoyancy body combined keel neck from the completely dry ship may be further included. .

Here, the buoyancy body combined keel neck may include a coupling member that is fixed to or separated from the lower part of the hull base line of the partially dried ship or the fully dried ship; and a buoyancy chamber coupled to the coupling member and accommodating ballast water.

In this case, the method may further include forming supports for supporting both ends of the hull base line of the partially dried ship or the fully dried ship on both sides of the upper surface of the buoyancy chamber.

In addition, the coupling member is arranged in a plurality of groups spaced apart to face each other along the hull base line of the partially built ship or the fully built ship, or is arranged at intervals in a diagonal direction, the upper surface in one direction at the bottom of the hull base line It is formed in a cross-shaped shape to be fixed, and a cross-shaped stopper corresponding to the shape of the coupling member and having an allowance may be formed by indenting the upper end of the buoyancy chamber.

In addition, the coupling member is spaced apart along the hull base line of the partially dried ship or the fully dried ship and arranged in a plurality to form a cross shape in which the upper end surface in one direction is fixed to the lower part of the hull base line, and the upper end of the buoyancy chamber is the A cross-shaped stopper corresponding to the shape of the coupling member and having an allowance may be formed by being recessed.

Here, the stopper may be recessed to have a margin of 5% to 10% with respect to the coupling member.

In addition, the step of removing the buoyancy body combined keel neck from the completely dry ship is, after completely pouring into the buoyancy body combined keel neck of the completely dry ship, the coupling member from the lower part of the hull base before the buoyancy of the completely dry ship can be removed by separating and removing, or after separating the coupling member from the stopper and withdrawing the completely dry ship from the dry dock to the quay wall, by separating and removing the coupling member from the lower part of the hull base in the quay wall.

In addition, the step of removing the buoyancy body combined keel neck from the completely dry ship is, after completely pouring into the buoyancy body combined keel neck of the completely dry ship, the coupling member from the lower part of the hull base before the buoyancy of the completely dry ship After separation, the coupling member may be fixed to the stopper, or additional water may be poured into the coupling member to prevent the coupling member from floating by its own buoyancy.

In addition, the buoyancy body combined use keelbanmok, buoyancy chamber for accommodating ballast water; And extending in the full-length direction, the lower surface is integrally fixed to the buoyancy chamber and the upper surface may include a half-wood structure fixed to or separated from the base of the hull of the partially-dried ship or the fully-dried ship.

Here, the step of removing the buoyancy body combined keel neck from the completely dry ship is, after completely pouring into the buoyancy body combined keel neck of the completely dry ship, before the buoyancy of the completely dry ship, the half neck structure from the lower part of the hull base line can be separated and removed.

According to the present invention, it is possible to provide complete and stable additional buoyancy force regardless of the buoyancy draft of a partially dry ship by attaching a keel pelvic neck for a buoyancy body to the lower part of the hull base line, and at the same time to perform the role of a banquet in the dry dock. can

In addition, according to the present invention, it can be applied universally regardless of the ship type, can reduce the amount of ballast for the hull floating of a partially built ship, and it is possible to load various payloads while satisfying the allowable draft and balance maintenance conditions can make it

In addition, according to the present invention, even if the weight of the engine room area increases due to the recent additional equipment specifications of eco-friendly ships, it is possible to provide sufficient buoyancy to a one-hold or two-hold partially built vessel to buoy it. There is an effect that can contribute to the efficiency and productivity of the dock arrangement through this.

1 illustrates an additional buoyancy launching method of a ship according to the prior art and an apparatus suitable therefor.
Figure 2 shows a flow chart of a dry dock tandem launching method using a keel pelvic neck with an additional buoyancy according to an embodiment of the present invention.
Figure 3 shows the buoyancy body combined use keel pelvic neck of the first embodiment of the dry dock tandem launching method using the buoyancy body combined keel neck with the additional buoyancy of Figure 2.
Figure 4 shows the combined structure of the hull and the buoyancy body combined keel of Figure 3;
Figure 5 shows the buoyancy body combined keel pelvic neck of the second embodiment of the dry dock tandem launch method using the buoyancy body combined keel pelvic neck having the additional buoyancy of Figure 2.
Figure 6 shows the combined structure of the buoyancy body combined use of the keel and hull of Figure 5.
Figure 7 illustrates the buoyancy body combined keel neck hull attachment step of the dry dock tandem launch method using the buoyancy body combined keel neck with additional buoyancy of Figure 2.
8 and 9 illustrate the launching process according to the dry dock tandem launching method using the keel and keel neck with the additional buoyancy of FIG. 2 .

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

Dry dock tandem launching method using a buoyancy body combined keel neck with additional buoyancy according to an embodiment of the present invention, as a whole, includes a buoyancy body combined keel neck determination step (S110), a hull effect preliminary review step (S120), Buoyancy body combined keel neck dock arrangement step (S130), hull lower inspection step (S140), buoyancy body combined keel neck hull attachment step (S150), additional buoyancy generation step (S160), buoyancy body of a fully dry ship 1 in the same dry dock, including the combined keel and pelvic neck removal step (S170), the dry ship buoyancy step (S180), the fully dry ship quay wall withdrawal step (S190), and the partially dry ship dock gate withdrawal step (S200) In the tandem launching method (see Fig. 8), in which a plurality of same or different types of ship blocks are built in rows or two rows, respectively, and a fully built ship and a partially built ship are launched at the same time (see Fig. 8) ), to perform the role of keel-bark during hull construction, and to provide additional buoyancy during flotation.

Hereinafter, with reference to FIGS. 2 to 9 , the dry dock tandem launching method using the keel neck for buoyancy having the above-described additional buoyancy will be described in detail as follows.

First, in the determining step (S110) of the buoyancy body combined use of the keel and pelvic neck, according to the weight and buoyancy of the partially dried ship in the dry dock according to the production standard plan in the ship design stage, the combined use of the buoyancy body that simultaneously performs the roles of the buoyancy body and the pelvis The size of the keel neck (110, 120) and the attachment and fixation position for the lower part of the hull base are determined.

The size or weight of the buoyancy body combined keel neck (110, 120) and the size or weight of the buoyancy body combined keel neck (110, 120) and the fixed position of the lower part of the hull base line are determined in advance before production.

Subsequently, in the hull impact pre-examination step (S120), the effect on the hull of the buoyancy body combined keel neck (110, 120) during the buoyancy of the partially dry ship is reviewed in advance, and the By simulating the stability of the hull according to the supporting strength of the hull as a hull as a hull as a buoyancy and the balance of the hull according to the degree of buoyancy as a buoyancy body by to figure it out in

Here, when the supporting strength or additional buoyancy by the buoyancy body combined keel neck (110, 120) is not met, the buoyancy body combined keel neck determination step (S110) to readjust the size and hull fixing position of the buoyancy body combined keel neck (110, 120) to determine ) can be fed back (S121).

Subsequently, in the dock arrangement step (S130) of the buoyancy body combined keel, as shown in (a) of FIG. 9, before the keel laying step of the partially dry ship, the buoyancy body at the determined placement position in the dry dock The combined keel pelvic neck (110, 120) is seated and arranged.

Subsequently, in the lower hull inspection step (S140), the inspection of the lower hull to which the buoyancy body combined keel neck (110, 120) is attached and the coupling member 111 of the buoyancy body combined keel neck 110 of the first embodiment to be described later to be described later ) are also formed.

On the other hand, as shown in Figures 3 and 4, the buoyancy body combined keel neck 110 of the first embodiment, the upper end surface is fixed or separated in the lower part of the hull base line of the partially dried ship 111 and the coupling member, It may be composed of a buoyancy chamber 112 coupled to the lower surface of the member 111 and having an internal space for accommodating ballast water. Here, a plurality of filling spaces partitioned by partition walls may be formed inside the buoyancy chamber 112 , and a watering hole (not shown) and a buoyancy chamber formed on the side or upper surface of the buoyancy chamber 112 by a pump (not shown). (112) By pouring or draining ballast water of seawater or fresh water through a drain hole (not shown) formed in the bottom surface, additional buoyancy as necessary for buoyancy can be generated according to the design standards of the ship design stage.

Here, some ballast water may be injected into the filling space inside the buoyancy chamber 112 in order to generate additional buoyancy as necessary for the buoyancy of the partially dry ship, or may not be injected at all.

For example, the coupling member 111 is arranged in a plurality of groups spaced apart to face each other along the hull base line (see Fig. 3 (a)), or arranged at intervals in the diagonal direction (Fig. 3 (b)) See), a cross-shaped stopper 113 corresponding to the shape of the coupling member 111 and having a margin at the upper end of the buoyancy chamber 112 is formed in a cross-shaped shape in which the upper surface in one direction is fixed to the lower part of the hull base line by welding. ) is formed by being recessed, so that the coupling member 111 is inserted and fixed to the cross-shaped stopper 113 to prevent separation or deformation of the coupling member 111 in the XY direction to be stably supported on the buoyancy chamber 112 can make it happen

Here, only one side in the X-axis direction or only one side in the Y-axis direction among the upper surfaces of the cross-shaped coupling member 111 is welded and fixed to the lower part of the hull base, so that the removal of the coupling member 111 from the lower part of the base of the hull can be easily performed. have.

Alternatively, the coupling member 111 is spaced apart along the hull base line and arranged in plurality (see Fig. 3 (c)), and is formed in a cross-shaped shape in which the upper end surface in one direction is fixed to the lower part of the hull base line by welding, buoyancy A cross-shaped stopper 113 corresponding to the shape of the coupling member 111 and having a margin is formed in the upper end of the chamber 112, so that the coupling member 111 is inserted and fixed to the cross-shaped stopper 113. By preventing separation or deformation of the coupling member 111 in the XY direction, it can be stably supported on the buoyancy chamber 112 .

Here, the stopper 113 is recessed to have a spatial margin of 5% to 10% with respect to the coupling member 111 , so that the coupling member 111 can be smoothly inserted into the stopper 113 .

In addition, as shown in FIG. 4, after seating the hull keel on the coupling member 111, if necessary, on both sides of the upper surface of the buoyancy chamber 112, a support for supporting both ends of the lower part of the hull base of the partially dried ship ( By further comprising the step (S141) of additionally forming 114), by additionally preventing unexpected overturning of the hull by the support of the hull of the support 114, the role of the buoyancy combined keel neck 110 may be supplemented. .

For reference, assuming the shape of the buoyancy chamber 112 of the first embodiment is a hexahedron, the height is 1.8m, the width corresponding to the extreme breadth of the hull is 40m, and the width is 20m, the buoyancy chambers 112 and 121 can generate up to 1440 tons of additional buoyancy.

In addition, as shown in Figures 5 and 6, the buoyancy body combined keel neck 120 of the second embodiment, the buoyancy chamber 121 for accommodating ballast water, and the full length (length over all) direction and extending in the lower end The surface may be integrally fixed to the buoyancy chamber 121 and the upper surface may be composed of a half-wood structure 122 made of steel material that is fixed or separated by welding in the lower part of the hull base of the partially dry ship.

Here, a plurality of filling spaces partitioned by partition walls may be formed inside the buoyancy chamber 121, and a watering hole (not shown) and a buoyancy chamber formed on the side or upper surface of the buoyancy chamber 121 by a pump (not shown). (121) By pouring or draining seawater or fresh water ballast water through a drain hole (not shown) formed in the bottom surface, additional buoyancy force as necessary for flotation can be generated according to the design standards of the ship design stage.

Here, some ballast water may be injected into the filling space inside the buoyancy chamber 121 in order to generate additional buoyancy as necessary for the buoyancy of the partially dry ship, or may not be injected at all.

On the other hand, as shown in FIG. 6, after seating the hull keel on the half-wood structure 122, if necessary, on both sides of the upper surface of the buoyancy chamber 121, the support 114 for supporting both ends of the lower part of the hull base of the building vessel ) further comprising the step (S141) of additionally forming, by additionally preventing unexpected overturning of the hull by the support of the hull of the support 114, the role of the buoyancy combined keel pelvis 120 may be supplemented.

Subsequently, in the hull attachment step (S150) of the buoyancy body combined keel neck, as shown in FIGS. 7 and 9 (b), after performing the keel mounting step of the stern, the buoyancy body combined keel half neck ( 110 and 120) are attached and fixed to the lower part of the hull base line of the partially built ship by welding, so as to perform the role of an antagonism against the partially built ship.

Thereafter, in the additional buoyancy generation step (S160), when the fully dry ship is launched, the ballast water of seawater or fresh water is poured or drained through the pump into the buoyancy body combined keel pelvic neck (110, 120) of the partially built ship. According to the standard, it creates additional buoyancy as necessary for flotation.

Subsequently, in the step (S170) of removing the keel neck for the buoyancy body of the completely dry ship, the buoyancy body combined keel neck (110, 120) is removed by welding from the lower part of the hull base of the completely dry ship before watering into the dry dock, as shown in FIG. As shown in (c), when water is poured into the dock gate, the keel and pelvic necks 110 and 120 for the buoyancy body of the fully dry ship are not lifted, and only the fully dry ship is floated.

At this time, the aforementioned buoyancy combined keel neck may also be attached to the lower part of the hull base of the fully dry ship. As will be described later, the partially dry ship to which the buoyancy combined keel neck is attached is buoyed in the direction of the dock gate of the dry dock. This is a case in which the ship becomes a completely dry ship by withdrawing from the ship and sinking after draining to carry out the remaining hull work.

On the other hand, after completely pouring the buoyancy body combined keel neck 110 of the first embodiment and then removing the coupling member 111 from the lower part of the hull base line by welding before the buoyancy of the completely dry ship, or the coupling member from the stopper 113 After separating (111) by welding and withdrawing the completely dry ship from the dry dock to the quay wall, at the quay wall stage, the coupling member 111 is separated from the lower part of the hull base line by welding, and from the lower part of the hull base line. The buoyancy body combined keel neck 110 can be completely removed.

Here, before the completely dry ship floating in the dry dock, after separating the coupling member 111 from the lower part of the hull base, the coupling member 111 is welded to the stopper 113 and fixed, or the coupling member 111 is By pouring water into the inner filling space to increase the weight to offset the buoyancy, it is also possible to prevent the separated coupling member 111 from being lifted by its own buoyancy when the fully dry ship is buoyed.

On the other hand, after completely pouring water into the buoyancy body combined keel half-neck 120 of the second embodiment, the half-wood structure 122 is removed by welding from the lower part of the hull base before the floating of the completely dry ship, (122) is separated so that it does not float.

Subsequently, in the dry ship buoyancy step (S180), as shown in FIG. 9(c), the dock gate is opened and seawater is introduced into the dry dock for water supply, and the fully dry ship and the partially dry ship are lifted and partially It is possible to stably float in the dry dock while maintaining the equilibrium of the hull by the buoyancy of the dry ship itself and the additional buoyancy of the keel neck (110, 120) used for the buoyancy body.

That is, even during partial launch of one-hold or two-hold, the buoyancy is not sufficient compared to a fully dry ship, but by attaching the buoyancy combined keel neck (110, 120) to the one-hold or two-hold partially dry ship to provide additional buoyancy, By providing sufficient buoyancy to offset the increase in the weight of the engine room area due to the additional equipment specifications for eco-friendly ship building, it is possible to simultaneously float both the fully-dried ships scheduled to withdraw the quay walls and the partially-built ships that require additional hull work. have.

Accordingly, it is possible to improve productivity by mounting various payloads irrespective of weight even during partial ship drying in the dry dock.

Subsequently, in the completely dry ship quay wall withdrawal step (S190), the completely dry ship from which the buoyancy body combined keel necks 110 and 120 are removed is withdrawn from the dry dock to the quay wall by the tug ship.

Finally, in the partially dried ship dock gate withdrawal step (S200), as shown in FIGS. 9 (d) and (e), the partially dried ship is drawn out in the dock gate direction of the dry dock, the dock gate is closed, and the dry dock Drain the seawater from the buoyancy body and sink the partially-dried ship with attached keel necks (110, 120) in the dry dock, and perform the remaining hull work, but with the buoyancy combined-use keel necks (110, 120) attached to the lower part of the hull base of the partially dried ship. to play the role of antagonism against partially built ships.

After that, the process of attaching the keel neck for the buoyancy body to the lower part of the hull base line by placing another keel neck for the buoyancy body and keel neck to the emptied dry dock after withdrawing the partially dried ship toward the dock gate and seating the other partly dried ship is repeated. Thus, it is possible to improve the arrangement efficiency of the hull.

Therefore, by the configuration of the dry dock tandem launching method using the buoyancy body combined keel neck with additional buoyancy as described above, the buoyancy body combined keel neck is attached to the lower part of the hull base line and is completely independent of the buoyancy draft of the partially dry ship. And it can provide stable additional buoyancy, and at the same time play the role of antagonism in the dry dock, can be applied universally regardless of ship type, can reduce the amount of ballast for hull floatation, and allowable draft And it enables the loading of various payloads while satisfying the conditions for maintaining equilibrium, and provides sufficient buoyancy to a one-hold or two-hold partially-dried ship to float even if the weight of the engine room area increases due to the additional equipment specifications of eco-friendly ships. can

In the above, the present invention has been described with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments within the scope equivalent to the present invention are possible by those skilled in the art to which the present invention pertains. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

110,120: buoyancy body combined use of keel shank 111: coupling member
112: buoyancy chamber 113: stopper
114: support 121: buoyancy chamber
122: half timber structure A: deck house
B: engine casing

Claims (12)

The size of the keel and keel neck for the buoyancy body combined with the buoyancy body and the fixing of the lower part of the hull base ship according to the weight and buoyancy of the partially built ship in the dry dock for building a plurality of same or different types of ship blocks in one or two rows determining a location;
Before the keel mounting step of the partially dry ship, disposing the buoyancy body combined keel neck in the dry dock;
Inspecting the lower part of the hull of the partially dried ship to which the buoyancy body combined keel neck is attached;
attaching the buoyancy body combined keel neck to the lower part of the hull base line of the partially built ship;
generating additional buoyancy by pouring or draining ballast water to the keel and pelvic neck for the buoyancy body of the partially built ship when the fully dry ship is launched;
Floating the fully dry ship and the partially dry ship by pouring water into the dry dock;
withdrawing the completely dry ship from the dry dock to the quay wall; and
Buoyancy with additional buoyancy, including; withdrawing the partially dried vessel in the direction of the dock gate of the dry dock, draining it into the dry dock, sinking the partially dried vessel in the dry dock, and performing the remaining hull construction Dry dock tandem launching method using a sieve and keel neck. The method of claim 1,
Before the step of placing the buoyancy body combined keel neck in the dry dock,
Dry dock tandem launching method using a buoyancy body combined keel neck with additional buoyancy, characterized in that it further comprises the step of pre-examining the effect on the hull of the buoyancy body combined keel neck when the partially dry ship is buoyed. The method of claim 1,
The keel neck for the buoyancy body is attached to the lower part of the hull base of the completely dry ship,
Dry dock tandem launching method using a buoyancy combined keel neck with additional buoyancy, characterized in that it further comprises the step of removing the buoyancy body combined keel neck from the completely dry ship before pouring into the dry dock. 4. The method of claim 3,
The buoyancy body combined use of the keel neck,
a coupling member fixed to or separated from the base of the hull of the partially built ship or the fully built ship; and
a buoyancy chamber coupled to the coupling member and accommodating ballast water;
Dry dock tandem launching method using a keel pelvic neck combined with a buoyancy body with additional buoyancy, characterized in that it comprises a. 5. The method of claim 4,
The buoyancy body combined keel pelvic neck with additional buoyancy, characterized in that it further comprises the step of forming supports for supporting both ends of the lower part of the hull base line of the partially dried ship or the fully dried ship on both sides of the upper surface of the buoyancy chamber Dry dock tandem water launch method. 5. The method of claim 4,
The coupling member is arranged in a plurality of groups spaced apart to face each other along the base line of the hull of the partially built ship or the fully built ship, or arranged to be spaced apart from each other at intervals in the diagonal direction, so that the upper surface in one direction is fixed to the lower part of the base line of the hull It is formed in the shape of a cross,
Dry dock tandem launching method using a keel neck for a buoyancy body with additional buoyancy, characterized in that a cross-shaped stopper corresponding to the shape of the coupling member and having a margin is indented at the upper end of the buoyancy chamber. 5. The method of claim 4,
The coupling member is spaced apart along the hull base line of the partially dried ship or the fully dried ship and arranged in a plurality to form a cross shape in which the upper end surface in one direction is fixed to the lower part of the hull base line,
Dry dock tandem launching method using a keel neck for a buoyancy body with additional buoyancy, characterized in that a cross-shaped stopper corresponding to the shape of the coupling member and having a margin is indented at the upper end of the buoyancy chamber. 8. The method according to claim 6 or 7,
The stopper is a dry dock tandem launching method using an additional buoyancy combined keel neck with additional buoyancy, characterized in that the stopper is recessed to have a margin of 5% to 10% with respect to the coupling member. 8. The method according to claim 6 or 7,
The step of removing the keel and pelvic neck combined with the buoyancy body from the completely dry ship,
After completely pouring water into the keel neck for the buoyancy body of the completely dry ship, remove and remove the coupling member from the lower part of the hull base before the buoyancy of the completely dry ship, or separate the coupling member from the stopper and dry the completely After withdrawing the ship from the dry dock to the quay wall, the dry dock tandem launching method using a keel neck for buoyancy with additional buoyancy, characterized in that the coupling member is separated and removed from the lower part of the hull base in the quay wall. 8. The method according to claim 6 or 7,
The step of removing the keel and pelvic neck combined with the buoyancy body from the completely dry ship,
After completely pouring water into the keel neck for the buoyancy body of the completely dry ship, and after separating the coupling member from the lower part of the hull base before the buoyancy of the completely dry ship, the coupling member is fixed to the stopper, or the coupling member Dry dock tandem launching method using a keel neck for a buoyancy body with additional buoyancy, characterized in that the coupling member does not float by its own buoyancy by adding additional water to the inside. 4. The method of claim 3,
The buoyancy body combined use of the keel neck,
a buoyancy chamber for accommodating ballast water; and
Additional buoyancy, characterized in that it includes a half-wood structure extending in the full-length direction and having a lower end surface integrally fixed to the buoyancy chamber and an upper surface fixed to or separated from the lower part of the hull base of the partially or completely dry ship Dry dock tandem launching method using the equipped buoyancy body and keel neck. 12. The method of claim 11,
The step of removing the keel and pelvic neck combined with the buoyancy body from the completely dry ship,
Buoyancy body combined keel with additional buoyancy, characterized in that after completely pouring water into the buoyancy body combined keel neck of the completely dry ship, the half neck structure is separated and removed from the lower part of the hull base before the buoyancy of the completely dry ship Dry dock tandem launching method using half-wood.

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