DE112007000108B4 - Flooding method for use in a tandem shipbuilding process - Google Patents

Abstract

Lowering method for use in a tandem shipbuilding process, wherein a plurality of ships are sequentially assembled in a single dock by means of assembly steps and swim-to-float steps, the method comprising the steps of:
Constructing ship blocks according to a general tandem shipbuilding process in a dock (S100);
Mounting at least one of the main mounting parts on a tandem ship to be lowered before a ship whose launching is to be performed is made to float in the dock (S200);
Lowering the tandem vessel at the same position by allowing seawater to naturally flow into a cargo / ballast tank and a partially double-tandem tank of the tandem vessel when the ship whose launch is to be performed is made to float by Sea water is left in the dock (S400a); and
Continuing the construction work for the tandem ship at the same position after the vessel to be floated, whose launching is to be carried out, was towed out of the dock by a tugboat and the gate was ...

Description

Technical area

The The present invention relates to a lowering method which is disclosed in Tandem shipbuilding process is used, and more specifically, a tandem shipbuilding process a method is used in which lowered the hull of a tandem ship in which at least one assembly part is mounted on the tandem ship is, or a method in addition to the complete lowering or for lulling a tandem ship partially down a lashing is used, to increase the power to hold the tandem ship, so that shipbuilding tasks are finished at an original position can, without moving the hull of the tandem ship.

Technical background

The DE 2854472 C2 discloses a dry dock to ship new construction, the chamber is open at both ends to the port water surface by means of a barrier and which can be divided by a deployable in two different positions separation gate in two different lengths, the longer each section for final assembly of the hull and to float , while in each shorter section, a part of the following ship is built, which is built after implementation of the separation gate in now the longer chamber section performing docking part. The respective shorter chamber section has a sufficient length for the construction of the Bittelschiffs with the fore ship and at least one separable for the construction of Hiterschiffen known side chamber opens laterally into the main chamber, the separation gate in each of its two positions represents the continuation of one of the side walls of the side chamber ,

The DE 25 28 144 B2 discloses a hull construction system with a level fuselage mounting site and adjacent assembly stations whose level is above the water level, with a lying on the water side along the fuselage mounting space and parallel flood basin, which is surrounded by a lock wall together with the fuselage mounting position and one end face of a Floodgate is connected to the open water and its sole is much lower than the fuselage mounting base to swim up a hull on the fuselage mounting base when flooding the pool, to reclaim it into the flood basin and lower it to the water level of the open water and through the floodgate into the open water To bring water. The rear mounting station is at one end of the fuselage mounting site, and the bow and center assembly stations are located at the other end of the fuselage mounting site, and these mounting locations are separated from the fuselage mounting site by sluice gates. At least one gantry crane is provided, which can be moved on rails in a straight line along the fuselage mounting space and the remaining assembly stations.

The US 4,018,180 A discloses a shipbuilding berth mounted on the floor opposite a dock, which in turn faces open water. If a ship is built in this shipyard berth, temporary partitions are used in such a way as to enclose the shipbuilding berth and the dock, and water is introduced into the space between the walls so that the ship lifts off the ground in the shipbuilding berth The ship can be moved free-floating in the shipbuilding berth and released into the open water.

As Generally known in the art are used in a conventional Shipyard tracks laid on a sloped surface, and a ship becomes built on the rails, so if the construction of the ship finished, the ship on rails the inclined surface down can slide into the sea water. This type of launching system is tilted Called launching platform. The inclined launching platform will still be on small and medium-sized shipyards and on some big shipyards used. Recently, however, the general trend is to safety to ensure and to increase the efficiency of building large ships, a ship to build in a shipbuilding dock. In this case, a ship built in a dock and the launch of the ship is the Dock filled with seawater and the gate of the dock will open, so that the constructed ship be towed out of the dock can, and remaining shipbuilding works can outside of the dock become. In detail, this method is applied in a way that a ship that shorter is constructed as the dock, and by taking in seawater in the dock is floated, the gate of the dock is opened, dragged the floating ship out of the dock with a tugboat will be carried out and the remaining shipbuilding work outside the dock. Nevertheless, this method has the problem that the space utilization in the dock is bad and therefore this procedure is inefficient for the Mass production of ships.

To solve this problem, a tandem shipbuilding process has been proposed in the art. With this process, by improving space efficiency in a dock, two to four ships can be built simultaneously in one dock. In the tandem shipbuilding process, When a built-up ship is brought to swim and towed out of the dock, a partially constructed ship, in which some construction work has been performed, necessarily brought together with the built-up vessel, whose launching is to be performed, for swimming. Then, after the constructed ship whose launching is to be performed has been towed out of the dock, a gate of the dock is closed to position the partially constructed ship and seawater is drained from the dock. Thereafter, other construction work is performed in a shifted position or in an original position.

disclosure

Technical problem

Of the conventional Tandem shipbuilding process has the disadvantages described below. In the case that a tandem zone has a length that is not greater than 55% of LOA (overall length) of a ship is governed by the limitations of the specification of a dock, since the flooding is done in a way that the number of mounting parts on a tandem ship too mount is limited to a draft (of a maximum of 7.1 m) while swimming the ship to ensure the time to carry out the Working in the dock reduces what hinders the tandem shipbuilding process and makes it necessary to accelerate the construction work, which Problems of simultaneous realization of a larger number of work steps occur. In the conventional tandem shipbuilding process include the mounting hardware not mounted on the tandem ship before the ship is brought to swim, the main propulsion engine, Rear and intermediate shafts, a figure-eight block, a lashing bridge, a hatch cover and so on.

By Limiting the number of mounting parts on a tandem ship can be mounted before being brought to swimming will be when construction works to be performed on the tandem ship in the dock after being sent to Swimming was brought, causing the problems described below. Since the assembly of a deck house by the assembly of the tail and Intermediate shafts and the main drive motor after the swim-bring delayed is the supply of energy from the shore (through facilities on the shore) is expected to be difficult. Because the task of final alignment as an operation to review the verticality a rudder by mounting the figure eight block after swim-bringing delayed is less time to mount the propeller and the Oars available.

Further the floating ship blocks are not kept safe, but move so that it is possible for them to be together or collide with the wall of the dock, causing the under construction ship blocks break or damaged can be. About that In addition, it is difficult to bring the ship blocks to swim while maintaining the state of balance of the ship's blocks. Additionally must, after the ship blocks were brought to swim when the ship to be launched from the stack is towed out of the dock, drained from the dock seawater so that the floating blocks in one Position to carry the construction work can be arranged. In this regard is a lot of time and work required to get the ship blocks in one original Position or a shifted position.

consequently For example, the present invention has been made in the effort of the Prior art problems are eliminated and it is An object of the present invention is a tandem shipbuilding process to be provided using a descending method the at least one of main propulsion engine, stern and intermediate shafts, Eighth block, lashing bridge, Hatch cover is mounted on a tandem ship, so if the ship, whose launching is to be carried out, in a dock swim, the tandem boat is not for swimming but is lowered to the floor of the dock and so that after the ship, its launch will be carried out is towed out of the dock, the construction work on the same Place performed can be so that the construction of the tandem ship can be finished in the dock within a short time.

A Another object of the present invention is the provision a tandem shipbuilding process, in which a lowering method is used in which at least one of main propulsion engine, stern and intermediate shafts, aft block, lashing bridge, Hatch cover is mounted on a tandem ship that if the ship, whose launching is to be carried out, in a dock is brought to swim, the tandem ship to the bottom of the Docks is lowered, or not completely brought to swimming is set by the tandem ship to a predetermined depth is lowered, the position of the tandem ship by lashing is fastened, and so that after the ship, its launching be carried out is towed out of the dock, the construction work on the same Place performed can be so that the construction of the tandem ship in the dock within a short time can be stopped.

Technical solution

In order to achieve the first object, according to one aspect of the present invention, there is provided a lowering method used in a tandem shipbuilding process in which a plurality of ships are sequentially stored in a single dock by means of mounting steps and steps of swimming The method comprises the following steps:
Construction of ship blocks according to a general tandem shipbuilding process in a dock;
Mounting at least one of the main assembly parts on a tandem ship to be lowered before a ship whose launching is to be performed is made to float in the dock;
Lowering the tandem vessel at the same position by allowing seawater to naturally flow into a cargo / ballast tank and a partially double-tandem tank of the tandem vessel when the vessel whose launch is to be performed is made to float by sending seawater into it the dock is left; and
Continuing the construction work for the tandem ship at the same position, after the boat brought to float, whose launching is to be carried out, was towed by a tractor from the dock and the gate of the dock was closed.

In order to achieve the second object, according to another aspect of the present invention, there is provided a lowering method used in a tandem shipbuilding process in which a plurality of ships are sequentially stored in a single dock through assembly steps and steps of swimming-pooling. Bringens is built, the method comprising the following steps:
Construction of ship blocks according to a general tandem shipbuilding process in a dock;
Mounting at least one of the main assembly parts on a tandem vessel to be lowered in whole or in part before a ship whose launching is to be performed is made to float in the dock;
Lashing parts on both sides of the tandem ship to be lowered in whole or in part at the bottom of the dock;
Lowering or partially lowering the tandem vessel at the same position by allowing seawater to naturally flow into a cargo / ballast tank and a partially double-bottomed tank of the tandem vessel when the vessel whose launch is to be performed is made to float; by leaving seawater in the dock;
Releasing the lashing between the parts on both sides of the tandem ship that is lowered in whole or in part to the floor of the dock after the floated ship has been towed out of the dock and a gate of the dock has been closed; and
Continue the construction work for the tandem ship at the same position.

According to one Another aspect of the present invention includes in the step the assembly of at least one of the main assembly parts on a tandem ship, which is to be lowered in whole or in part, the main assembly parts a main propulsion engine, stern and intermediate shafts, a figure-eight block, a lashing bridge and a hatch cover.

According to yet another aspect of the present invention, the tying step is a step in which parts on both sides of at least one of a bow block, a figure eight block and an intermediate block of the tandem ship to be lowered in whole or in part, lashed down to the floor of the dock; and
the releasing step is a step in which the lashing between the parts on both sides of at least one part selected from a bow block, a figure eight block and an intermediate block of the tandem ship, which has been lowered in whole or in part, and the ground of the dock is solved.

According to still another aspect of the present invention, the lashing step is a step in which lashing tabs on parts on both sides of at least one of a bow block, a figure eight block and an intermediate block of the tandem ship are lowered in whole or in part lashings, corresponding to the lashing tabs, are formed on the floor of the dock, and the lashing tabs and lashing mounts are interconnected by lashing chains; and
the loosening step is a step in which the connection of the lashing chains between the lashing tabs, which are on parts on both sides of at least one of a bow block, a figure eight block and an intermediate block of the tandem ship, which are lowered in whole or in part should be, selected part are formed, and the corresponding lashing mounts, which are formed on the floor of the dock to be solved.

Thanks to the characteristics of the present invention, the advantages described below are realized. In a tandem shipbuilding process, since a deckhouse can be mounted on a tandem ship at an early stage, because shafts and the main propulsion engine have been assembled before the ship whose launching is to be performed is used Swimming will be ensured, the time for the supply of energy from shore (supplied by facilities on land).

Also can in the tandem shipbuilding process, since the final alignment possible on the tandem ship is because the aft block was mounted before the ship, whose Launching run The time to mount a ship's propeller is made to swim and a rudder.

Further can be mounted in the tandem shipbuilding process, due to the fact that main assembly parts before the ship whose launching is to be carried out, is brought to swim, the mounting load of a Goliath crane, after the ship whose launch is to be performed, brought to swim was, considerably be reduced.

In addition, can even in the event that the entire ship blocks are not on the floor of a dock can be lowered because a certain ship block has a part that is not lowered or structurally impossible, the ship's block completely lower so that a certain degree of buoyancy in the ship's block is generated by lashing the ship's block securely fixed in place in the dock.

Additionally can, even in the case where the amount of seawater that enters the Dock flows, is much bigger as the amount of seawater needed to lower the ship's blocks, so that generates a certain degree of buoyancy in the ship blocks will, while the ship blocks be lowered, the positions of the ship's blocks by lashing safely to be fixed in the dock.

Besides, even in the case where the movement of the ship's block, which is on the Bottom of the dock was lowered, by the inflow of Sea water or the flow of sea water takes place in the dock because of the Ship, whose launching is to be carried out, is pulled, the positions of the ship blocks to be fixed securely in the dock by lashing, taking the times for the assembly or assembly of main parts in the tandem shipbuilding process considerably shortened can be. As a result, the industrial applicability of the present Invention can be expected.

Description of the drawings

1 (a) Fig. 10 is a flowchart illustrating a tandem shipbuilding process in which a lowering method according to an embodiment of the present invention is used;

1 (b) Fig. 10 is a flowchart illustrating a tandem shipbuilding process using a lowering method in which a lashing according to another embodiment of the present invention is used;

2 Fig. 10 is a view illustrating the unchanged position of a ship to be lowered when the ship is constructed according to the present invention;

3 Fig. 12 is a view illustrating a conventional tandem shipbuilding process and the present tandem shipbuilding process using the lowering method;

4 Fig. 11 is a plan view illustrating positions on the hull block of a ship in which the lashing according to the present invention is performed;

5 are cross-sectional views along the lines AA, BB and CC in 4 which illustrate the lashed states in the corresponding positions of the hull block of the ship; and

6 is a view illustrating the structure of a lashing part.

1

Verzurrungs tab

2

Verzurrungs holder

3

Verzurrungs chain

Type of invention

in the The following will describe in more detail a preferred embodiment of the Invention, an example of which is in the accompanying Drawings is illustrated.

1 (a) FIG. 10 is a flowchart illustrating a tandem shipbuilding process in which a lowering method according to an embodiment of the present invention is used. Regarding 1 For example, the lowering method, in which a plurality of ships are sequentially assembled in a single dock by means of assembly steps and swim-to-swim steps, involves the following steps:
Constructing ship blocks according to a general tandem shipbuilding process in a dock (S100);
Assemble at least one of the main assembly parts on a tandem ship, which should be lowered before a ship is launched to be docked in the dock for swimming (S200);
Lowering the tandem vessel at the same position by allowing seawater to naturally flow into a cargo ballast tank and a partially double tandem tank of the tandem vessel when the ship whose launch is to be performed is made to float by sending seawater into the tandem vessel Dock is left (S400a); and
Continuing the construction work for the tandem ship at the same position after the vessel to be floated to be launched is towed out of the dock by a tugboat and the dock gate is closed (S600).

In the step of assembling at least one of the main mounting parts on a tandem ship to be lowered include the main mounting hardware a main propulsion engine, stern and intermediate shafts, a figure-eight block, a lashing bridge and a hatch cover.

1 (b) FIG. 11 is a flowchart illustrating a tandem shipbuilding process using a lowering method in which a tie down according to another embodiment of the present invention is used. The lowering method according to the present embodiment is basically the same as that in FIG 1 (a) lowering method shown, with the exception that in the step of lowering a step of partial lowering and lashing is used to increase the force to attach the wholly or partially lowered tandem ship. In detail, the method comprises the following steps:
Constructing ship blocks according to a general tandem shipbuilding process in a dock (S100);
Mounting at least one of the main assembly parts on a tandem ship to be lowered in whole or in part before a ship whose launching is to be performed is made to float in the dock (S200);
Lashing parts on both sides of the tandem ship to be lowered in whole or in part at the bottom of the dock (S300);
Lowering or partially lowering the tandem vessel at the same position by allowing seawater to naturally flow into a cargo ballast tank and a partially double-tandem tank of the tandem vessel when the vessel whose launch is to be performed is made to float Seawater is left in the dock (S400b);
Release the tie-down between the parts on both sides of the tandem ship that are lowered in whole or in part to the bottom of the dock after the vessel floated by a tugboat is towed out of the dock and a dock gate closed (S500) ; and
Continue the construction work for the tandem ship at the same position (S600).

In the step of assembling at least one of the main mounting parts on a tandem ship, which are lowered in whole or in part should include the main assembly parts a main propulsion engine, stern and intermediate shafts, a figure-eight block, a lashing bridge and a hatch cover.

The lashing step is a step in which parts on both sides of at least one of a bow block, a figure eight block, and an intermediate block of the tandem ship to be lowered in whole or in part are lashed to the floor of the dock become; and
the releasing step is a step in which the lashing between the parts on both sides of at least one part selected from a bow block, a figure eight block and an intermediate block of the tandem ship, which has been lowered in whole or in part, and the ground of the dock is solved.

Concretely, the step of lashing is a step in which lashing tabs are formed on parts on both sides of at least one part selected from a bow block, a figure eight block, and an intermediate block of the tandem ship to be lowered in whole or in part Lashing brackets corresponding to the lashing tabs are formed on the floor of the dock, and the lashing tabs and lashing brackets are connected by lashing chains; and
the loosening step is a step in which the connection of the lashing chains between the lashing tabs, which are on parts on both sides of at least one of a bow block, a figure eight block and an intermediate block of the tandem ship, which are lowered in whole or in part should, selected part are formed, and the corresponding lashing mounts, which are formed on the floor of the dock is released.

2 Fig. 12 is a view illustrating the unchanged position of a tandem ship to be completely or partially lowered when the tandem ship is constructed according to the present invention. It should be understood that a main drive motor, rear and intermediate shafts, a figure eight block, etc. are mounted on the respective blocks of a ship to be lowered in the rear of a dock before the ship is lowered. A lashing bridge and hatch cover are omitted for ease of illustration.

It must be understood that the ship is at an original Position is built even after the ship has been lowered, and therefore the position of the ship is not changed.

3 FIG. 13 is a view illustrating a conventional tandem shipbuilding process and the present tandem shipbuilding process in which the lowering process is employed. Regarding 3 It must be understood that in the traditional tandem shipbuilding process, the main parts, such as a main propulsion engine, rear and intermediate shafts, a figure-eight block, a lashing bridge and a hatch cover are not assembled.

in the By contrast, it must be understood that in the present tandem shipbuilding process, in which the lowering method is used as the main installation parts a main propulsion engine is mounted in a machine room, stern and Intermediate shafts are mounted in the lower part of a ship Eight block over the rudder is mounted, and a lashing bridge and a hatch cover in the be mounted on the upper part of the ship. Therefore, the present Tandem shipbuilding process to point out that the main installation parts are mounted on their respective ship blocks.

Describes one the shipbuilding process according to the present Invention in detail, when the construction of a ship, the is first placed in a dock, essentially finished, and the ship according to the first-in-first-out principle of the tandem shipbuilding process ready for launching before the ship whose launching is to be performed, is brought to swimming, all the main installation parts on the remaining ships or ship blocks mounted in the dock are under construction, and a cargo / ballast tank and a tank with Partially double ground becomes naturally on the ground lowered when the ship whose launch is to be performed, is brought to swim, so that the remaining ships or Ship blocks not to be brought to swim. As a result, in the present Shipbuilding process because the number of mounting parts on the remaining ships or ship blocks after swim-bringing to be mounted, an additional time of about 8 days for the Construction of the tandem ship to be ensured in the dock after the ship, whose launching is to be performed, for swimming was brought.

4 Figure 11 is a plan view illustrating positions on the hull block of a ship in which the lashing according to the present invention is performed. 5 are cross-sectional views along the lines AA, BB and CC in 4 which illustrate the lashed states in the corresponding positions of the hull block of the ship, and 6 is a view illustrating the structure of a lashing part. With reference to the 4 to 6 to tie down a tandem ship, lashing straps 1 on parts on both sides of at least one of a bow block C, a figure-eight A and an intermediate block B of the tandem-ship, which is to be lowered in whole or in part, lashing holders 2 are trained on the floor of a dock to tie down the lashing straps 1 to match, and the lashing straps 1 and the lashing mounts 2 be through lashing chains 3 connected with each other. Even though 6 for the sake of simplicity, only the figure-of-eight block A is selected 4 shows, it must be understood that the lashing straps 1 , the lashing mounts 2 and the lashing chains 3 in the bow block C and the intermediate block B are arranged. When the lashed condition is released, it is sufficient to complete the lashing chains 3 to remove.

At this time, the tension of the lashing chains 3 be adjusted by the lashing chains 3 from the positions of the lashing holders 2 or by chain tensioners and the like at predetermined positions on the lashing chains 3 to be used.

The Reasons, why the lashing done will be described below. That means that even in the case in which the entire tandem ship can not be lowered, the entire ship blocks can not be lowered to the bottom of a dock because a certain ship block has a part that is not lowered or structurally impossible, a ship's block completely lower, which means that a certain degree of buoyancy generated in the ship block, the tandem ship or the ship blocks Lashing securely on the spot in the dock can be fixed.

Furthermore can, even in the case where the amount of seawater that is in the dock is flowing, is much bigger as the amount of seawater needed to lower the tandem ship, so that generates a certain degree of buoyancy in a ship's block must be while the tandem ship is lowered, the position of the tandem ship by lashing securely fixed in the dock.

In addition, even in the case where the movement of the ship block that has been lowered to the floor of the dock is due to the inflow of seawater or the flow of seawater in the dock, because the ship whose launch is carried out, the positions of the ship's blocks are securely fixed by lashing in the dock.

Even though preferred embodiments of the present invention have been described for the purpose of explanation, One skilled in the art will recognize that various changes, additions and substitutions possible are without departing from the scope and spirit of the invention, as in the accompanying claims disclosed.

Claims (5)

Lowering method for use in a tandem shipbuilding process, where a variety of ships in turn in a single dock built up by assembly steps and steps to swim-bring The method comprises the following steps: construction of ship blocks according to one general tandem shipbuilding process in a dock (S100); Assembly at least one of the main assembly parts on a tandem ship, which should be lowered before a ship whose launching is carried out is to swim in the dock (S200); lower of the tandem ship at the same position, putting seawater naturally in a cargo / ballast tank and a partially double tank Ground of the tandem ship flow allowed when the ship whose launch is performed is supposed to be made to swim by putting seawater in the dock is left (S400a); and Continue the construction work for the tandem ship the same position after the boat, whose launch was carried out to be towed out of the dock by a tugboat and the gate of the dock was closed (S600). Lowering method for use in a tandem shipbuilding process, where a variety of ships in turn in a single dock built up by assembly steps and steps to swim-bring The method comprises the following steps: construction of ship blocks according to one general tandem shipbuilding process in a dock (S100); Assembly at least one of the main assembly parts on a tandem ship, which should be lowered in whole or in part before a ship, whose launch was carried out to be docked in the dock for swimming (S200); lashing of parts on both sides of the tandem ship, in whole or in part to be lowered at the bottom of the dock (S300); lower or partially lowering the tandem ship at the same position, natural seawater in a cargo ballast tank and a tank with partially double Floor of the tandem ship to flow allowed when the ship whose launch is performed ought to be made to swim by letting seawater into the dock becomes (S400b); To solve the lashing between the parts on both sides of the tandem ship, which is lowered in whole or in part to the floor of the dock after the a floating boat was towed out of the dock and a gate of the dock was closed (S500); and Continue the construction work for the tandem ship at the same position (S600). Method according to claim 2, wherein the step of lashing (S300) is a step in the parts on both sides at least one from a bug block, a figure eight block and an intermediate block of the tandem ship, the wholly or partially lowered, selected part with lashed to the floor of the dock; and the step of loosening (S500) is a step in which the lashing between the parts on both sides at least one from a bow block, a figure eight block and an intermediate block of the tandem ship, in whole or in part was lowered, selected Part and the bottom of the dock is released. Method according to claim 1 or 2, wherein in the step of assembling at least one of the main mounting parts on a tandem ship the main assembly parts a main propulsion engine, Rear and intermediate shafts, a figure-eight block, a lashing bridge and include a hatch cover. Method according to claim 2 or 3, wherein the step of lashing (S300) is a step in the lashing straps on parts on both sides at least one of a bow block, a figure eight block and an intermediate block of the tandem ship to be lowered in whole or in part, chosen Be formed part, lashing holders, which correspond to the lashing straps, be formed on the floor of the dock, and the lashing straps and the lashing holders by lashing chains with each other get connected; and wherein the releasing step (S500) a step in which the connection of the lashing chains between the Lashing straps that are on parts on both sides at least one of a bow block, a figure eight block and an intermediate block part or part of the lowered part of the tandem vessel are formed, and the corresponding lashing mounts, which are formed on the floor of the dock, is released.