KR102157346B1 - Method for shipbuilding by adapting non-floating tandem in dry dock - Google Patents

Abstract

The present invention provides a method of building a ship by applying a non-floating tandem in a dry dock, which comprises the steps of: drying a plurality of homogeneous or heterogeneous ship blocks in one or two rows in the same dry dock, respectively, performing a hull construction of a partially launched ship in an area adjacent to a dock head, and performing a hull partial construction of the launched ship in an area adjacent to a dock gate; forcibly perch water into the partially launched ship through a pump; opening the dock gate of the dry dock, introducing seawater, floating the launched ship, and non-floating the partially launched ship; taking out the floated partially launched ship towards a wall on an external side of the dock gate; closing the dock gate and draining the seawater from the dry dock; and performing the remaining hull partial construction for the partially launched ship at the same position. The present invention can forcibly perch clean water or seawater separately to minimize the ship body corrosion and non-float the partially launched ship; can simultaneously dry the launched ship and the partially launched ship when drying homogeneous or heterogeneous ships in the same dry dock, and non-float the partially launched ship in a stable manner while keeping the balance when discharging the launched ship; can forcibly perch water differently by corresponding to the step of drying the partially launched ship and thus, give no impact to the launch of the launched ship.

Description

Shipbuilding method using dry dock non-floating tandem method{METHOD FOR SHIPBUILDING BY ADAPTING NON-FLOATING TANDEM IN DRY DOCK}

The present invention is capable of stably unsustaining the partial launching ship while maintaining a balance when the launching ship and the partial launching ship are simultaneously built while building the same or different ships within the same dry dock. In addition, it relates to a ship construction method applying the dry dock unsuspended tandem method, which can do not affect the launching of the launching ship by compulsory injection differently corresponding to the construction stage of the partial launching ship.

As is well known, ships are built by the dry dock method (dry dock method) for efficient large ship construction.The ship blocks are built on the dry dock and seawater is introduced into the dry dock to lift the ship to the quay and take it out. do.

On the other hand, a tandem method is applied in which a launching ship and a partial launching ship are simultaneously built by utilizing the free space in the dry dock.

For example, when applying the tandem method of launching ships of super-large container ships and partial launching ships of VLCC, when seawater flows into the dry dock, the bulkhead of the partial launching ship is disproportionately inclined toward the stern end due to the buoyancy of the cargo tank area. When the launching ship is lifted by the tug ship, the antagonist supporting the partial launching ship is used by the screw rotation of the tug ship, and the partial launching ship is likely to overturn. At the same time, there is a limit that cannot be dried.

As a prior art for solving this limitation, Korean Patent Publication No. 10-0796410 is disclosed. The submersion method applied to the conventional tandem construction method is a step of building a ship block by a tandem construction method in a dock. Wow, installing the main engine, tail and intermediate shaft, stern block, lashing bridge or hatch cover on the vessel to be submerged, and on the cargo/hold ballast and some double bottom tanks of the submerged vessel when floating a launching vessel. It consists of the step of submerging the ship at the same location by naturally inflowing water, and the step of proceeding to build the submerged ship after towing the launching ship.After loading all the loads, the ship is submerged and the ship is built at the same location without moving. Let it be done.

However, in the state where the main loads are mounted on the partial launching ship, the partial launching ship is flooded by naturally entering the cargo/hold ballast and some double-bottom tanks by the water flowing in to support the launching ship. As described above, it is possible only after completing the loading of the main loads on the partial launching vessel before launching the launching vessel, and the salvage timing of the launching vessel is delayed depending on the construction stage of the partial launching vessel in the state that the launching vessel is completed. There is a problem, and there is a possibility of corrosion of the hull due to salt and chlorine by submerging the partially launched ship by the water naturally introduced into the dock, that is, seawater, and the air is delayed due to the preceding or following processes to prevent corrosion of the hull There is this.

Accordingly, there is a need for an improved tandem method capable of minimizing air delay by lifting the launching ship regardless of the construction stage of the partial launching ship, and minimizing hull corrosion in preparation for inundation of the partial launching ship.

Korean Patent Publication No. 10-0796410 (Immersion method applied to tandem drying method) Korean Patent Laid-Open Publication No. 2012-0107587 (Ship construction method with shortened quay air)

The technical problem to be achieved by the idea of the present invention is that the launching ship is lifted irrespective of the construction stage of the partial launching ship, thereby minimizing air delay and minimizing hull corrosion in preparation for inundation of the partial launching ship. It is to provide a shipbuilding method using the unsuspended tandem method.

In order to achieve the above object, the present invention is to build a plurality of ship blocks of the same type or different types in one row or two rows in the same dry dock, but perform the hull construction of the partial launch ship in the area adjacent to the dock head, and the dock Performing the hull part construction of the launching ship in the area adjacent to the gate; Forcibly injecting into the partial launching vessel through a pump; Opening the dock gate of the dry dock to allow seawater to flow to float the launching ship, and unloading the partial launching ship; Carrying the floating ship to the outer quay wall of the dock gate; Closing the dock gate to drain seawater from the dry dock; And it provides a ship construction method applied to the dry dock non-floating tandem method including; and performing the remaining hull part construction for the partial launching ship at the same location.

Here, in order to offset the buoyancy of the partial launch ship and maintain a balance with COG, fresh water or seawater can be forcibly injected through the pump inside the cargo tank in which the bulkhead of the partial launch ship is formed.

At this time, when the deck house and the engine casing of the partial launching ship are mounted, each forcibly pouring into a pair of left and right SCO tanks adjacent to the engine casing, and when the deck house and engine casing of the partial launching ship are not mounted, the engine Most of them can be forcibly injected into the left and right pair of SCO tanks adjacent to the casing, and the remaining forced injection into each of the left and right pair of slop tanks.

In addition, it is possible to forcibly pour fresh water or seawater into the SCO tank and the slop tank.

In addition, when seawater is forcibly poured, salt and chlorine can be removed through a seawater desalination device before watering can be done.

In addition, it may further include the step of performing the hull portion construction of the subsequent ship to the discharge position of the launching ship.

According to the present invention, fresh water or seawater is separately forcibly poured to minimize the corrosion of the hull, and the partial launching vessel is not lifted, and when the same or different type of vessel is built in the same dry dock, the launching vessel and the partial launching vessel are simultaneously built. While carrying out the launching ship, the partial launching ship can be stably unsuspended while maintaining a balance, and it may not affect the launching of the launching ship by compulsory injection differently according to the construction stage of the partial launching ship. In addition, there is an effect of allowing a large-sized ship to be continuously dried while shortening the air by the tandem method.

1 is an illustration of a submerged method applied to the tandem drying method according to the prior art.
Figure 2 shows a flow chart of the shipbuilding method to which the dry dock non-floating tandem method is applied according to an embodiment of the present invention.
FIG. 3 schematically shows a dry dock implementing the shipbuilding method using the dry dock non-floating tandem method of FIG. 2.
FIG. 4 is a cross-sectional view of the stern of a partial launching ship to which the dry dock non-floating tandem method of FIG.
5 is a flowchart illustrating a process flow diagram of an unsuspended tandem method in the dry dock of FIG. 3.

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

Referring to Figure 2, the ship construction method to which the dry dock unsuspended tandem method according to an embodiment of the present invention is applied is, as a whole, a hull construction and a hull partial construction performing step (S110), a forced watering step (S120), Consisting of a seawater inflow step (S130), a launch ship carrying step (S140), a seawater drainage step (S150), a remaining hull portion construction performing step (S160), and a subsequent ship hull portion construction performing step (S170), The point is to enable the ship to be continuously built in tandem.

Specifically, referring to FIGS. 2 to 5, a ship building method using a dry dock non-floating tandem method according to an embodiment of the present invention will be described in detail as follows.

First, in the hull construction and hull partial construction performing step (S110), as shown in Figs. 3 and 5 (a), a ship block of a plurality of similar ships or different ships in one or two rows within the same dry dock Each of them is constructed, but the ship's hull construction is performed in the area adjacent to the dock head, and the ship's hull construction is performed in the area adjacent to the dock gate.

Here, the launching ship or the partial launching ship is not particularly limited, but may be a very large crude oil carrier (VLCC), a very large container ship, an LNG carrier, an LNG propulsion ship, or a large-scale construction ship of a chemical product carrier. , In the same dry dock having a length of 500m or more, it is possible to simultaneously build a launching ship with a length of around 400m (LOA) and a partial launching ship with a total length of around 120m in one or two rows.

For reference, the distance between the dock head and the partial launching vessel and the distance between the dock gate and the launching vessel requires a distance of around 5m, and the distance between the partial launching vessel and the launching vessel requires an interval of around 10m.

Subsequently, in the forced watering step (S120), as shown in FIG. 3, a partial launching vessel, that is, a partial launching vessel, when seawater flows into the dock by forcibly pumping water into the partial launching vessel through the pump P. Make sure that the fore part of is not supported by its own buoyancy.

In other words, to offset the buoyancy of the partial launching vessel due to the seawater density that varies depending on the water temperature, salinity and water pressure, and to maintain the balance with COG, a pump (P) is installed inside the cargo tank where the bulkhead of the partial launching vessel is formed. Clear water or seawater is forcibly poured through to prevent partial launching ships from being supported from support to prevent block fall in place.

On the other hand, referring to FIG. 4, when the deck house (D/H) and the engine casing (B) of a partial launching ship are mounted during forced injection, the bow part of the partial launching ship In other words, it is forcibly injected into a pair of left and right SCO tanks (SCO TK(P), (S)) adjacent to the engine casing (B), but based on VLCC, it is injected around 8000 tons each, so that the bow part of the partial launching ship is not supported. While avoiding it, balance the COG that is biased toward the rear end of the stern, so that the front and rear of the stern are not inclined unbalanced and partially lifted. For example, 8000 tons can be injected into No.5 SCO TK(P) and 7,950 tons can be injected into No.5 SCO TK(S), giving a total of 15,950 tons.

Alternatively, when the deckhouse (A) and engine casing (B) of a partial launch ship are not installed, the COG is less skewed to the rear end of the stern than when mounted, and most of them are forced into the left and right pair of SCO tanks adjacent to the engine casing (B). Water, and the remaining forced injection into the left and right pair of slop tanks (SLOP TK(P), (S)), but based on VLCC, the left and right pair of SCO tanks each with around 7000 tons of water, and the left and right pair of slop tanks. The water is injected around 800 tons each so that the stern is not lifted, and it is balanced with the COG that is relatively less skewed toward the rear end of the stern, so that the front and rear of the stern are inclined unbalanced to prevent partial lift. For example, 7100 tons each can be injected into No.5 SCO TK(P,S), 860 tons are injected into SLOP TK(P), 750 tons can be injected into SLOP TK(S), and a total of 15810 tons can be injected. .

Here, fresh water or seawater can be forcibly poured into the SCO tank and the slop tank through the pump (P). In the case of forced injection of seawater, salt through a seawater desalination device is used to minimize corrosion of the hull due to salt and chlorine. And after removing chlorine, it may be watered.

Accordingly, in accordance with the construction stage of the partial launching vessel, fresh water or seawater is forcibly injected in a different manner to stably unsuspend while maintaining the balance of the partial launching vessel, and the air delay does not affect the launching of the launching vessel. Can be minimized.

For reference, the pump (P) is shown to be disposed on a dry dock, but it can be mounted on a partial launching vessel to force injection, and the slop tank is a mixture of oil and seawater formed after various tank cleaning or flows from the engine room. As a tank to store and store the oily mixture of waste oil that comes out, it is arranged for the purpose of preventing marine pollution by oil and reducing the loss of cargo.

Subsequently, in the seawater inflow step (S130), as shown in (b) of FIG. 5, the dock gate of the dry dock is opened to induce seawater to float the launching ship, and the partial launching ship is unsuspended in place. Let it.

Subsequently, in the launching ship unloading step (S140), as shown in FIGS. 3 and 5C, the suspended launching ship is lifted to the outer quay wall of the dock gate by the tug ship and carried out.

Subsequently, in the seawater drainage step (S150), seawater is drained from the dry dock by closing the dock gate.

Subsequently, in the remaining hull partial construction performing step (S160), as shown in Fig. 5(d), the fresh water or seawater forcibly injected into the partial launching vessel is drained, and the partial launching vessel at the same location where it is flooded. Construction of the remaining hull parts for the rest of the ship is performed to build the launching ship.

Subsequently, in the subsequent ship hull portion construction performing step (S170), as shown in FIG. 5 (d), the hull portion construction of the subsequent ship is performed at the launching ship carrying location.

Therefore, by the construction of the shipbuilding method that applies the dry dock unsuspended tandem method as previously described, the partial launching vessel with the main payload is submerged by the seawater naturally flowing in to support the launching vessel by the inundation method of the prior art. In contrast, fresh water or seawater is separately forcibly poured to minimize corrosion of the hull, while partially floating ships are not lifted, and when the same or different ships are built within the same dry dock, both the launching ships and the partial launching ships are built at the same time. While carrying out the launching ship, the partial launching ship can be stably unsuspended while maintaining a balance, and it may not affect the launching of the launching ship by compulsory injection differently according to the construction stage of the partial launching ship. In addition, it is possible to continuously dry large-sized ships while shortening the air by the tandem method.

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 falling within the scope equivalent to the present invention are possible by those of ordinary skill in the art. Therefore, the true scope of protection of the present invention should be determined by the claims that follow.

S110: The hull construction and hull part construction steps
S120: Forced injection stage
S130: Seawater inflow stage
S140: step of taking out a launch ship
S150: seawater drainage stage
S160: Remaining hull part construction step
S170: Steps to perform subsequent ship hull construction
A: Deckhouse
B: Engine casing
P: pump
SLOP TK(P): Port slop tank
SLOP TK(S): Starboard slop tank
No.5 SCO TK(P): Port 5 side crude oil tank
No.5 SCO TK(S): Starboard No. 5 side crude oil tank

Claims (7)

In the same dry dock, a plurality of ship blocks of the same type or of different types are built in one or two rows, respectively, but carry out the hull construction of the partial launching ship in the area adjacent to the dock head, and the hull construction of the launching ship in the area adjacent to the dock gate. Performing;
Forcibly injecting water into the partial launch ship through a pump before opening the dock gate of the dry dock;
Opening the dock gate of the dry dock to allow seawater to flow to float the launching ship, and unloading the partial launching ship;
Carrying the floating ship to the outer quay wall of the dock gate;
Closing the dock gate to drain seawater from the dry dock; And
Including; and performing the remaining hull partial construction for the partial launching vessel at the same location,
In order to offset the buoyancy of the partial launching ship and maintain a balance with COG, fresh water or seawater is forcibly injected through the pump inside the cargo tank in which the bulkhead of the partial launching ship is formed,
In the step of forcibly pouring into the partial launching vessel through a pump, the cargo tank and the forced injection amount to be forcibly injected to maintain a balance with COG corresponding to the drying step of the partial launching vessel are determined, Ship building method using dry dock non-floating tandem method. delete The method of claim 1,
When the deck house and the engine casing of the partial launching ship are mounted, each of the pair of left and right SCO tanks adjacent to the engine casing is forcibly poured into a ship building method using a dry dock non-floating tandem method. The method of claim 1,
When the deckhouse and the engine casing of the partial launching ship are not mounted, most of them are forcibly poured into each of a pair of left and right SCO tanks adjacent to the engine casing, and the remaining forced injection into each of a pair of left and right slop tanks. Ship building construction method using the dock-free tandem construction method. The method according to claim 3 or 4,
A ship building method using a dry dock non-floating tandem method, characterized in that forcibly pouring fresh water or sea water into the SCO tank and the slop tank. The method of claim 5,
In the case of forced injection of seawater, the shipbuilding method applying the dry dock non-floating tandem method, characterized in that the water is injected after removing salt and chlorine through a seawater desalination device. The method of claim 1,
A ship building construction method using a dry dock non-floating tandem construction method, characterized in that it further comprises the step of performing a hull part construction of a subsequent ship at the launching ship carrying position.

Images