CN114787031B - Ship construction process suitable for dry dock non-floating type serial connection process - Google Patents
Ship construction process suitable for dry dock non-floating type serial connection process Download PDFInfo
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- CN114787031B CN114787031B CN202080085969.7A CN202080085969A CN114787031B CN 114787031 B CN114787031 B CN 114787031B CN 202080085969 A CN202080085969 A CN 202080085969A CN 114787031 B CN114787031 B CN 114787031B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims description 35
- 239000013535 sea water Substances 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000010779 crude oil Substances 0.000 claims description 13
- 239000013505 freshwater Substances 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 238000010612 desalination reaction Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000003949 liquefied natural gas Substances 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C1/00—Dry-docking of vessels or flying-boats
- B63C1/08—Graving docks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Ship Loading And Unloading (AREA)
- Cleaning Or Clearing Of The Surface Of Open Water (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a ship building process suitable for a dry dock non-floating type serial process, which comprises the following steps: respectively constructing a plurality of ship segments of the same type or different types in one or two rows in the same dry dock, performing a part of ship hull engineering of the launch ship in a dock adjacent area, and performing a part of ship hull engineering of the launch ship in a dock adjacent area; a step of forcibly injecting water into the part of the launch ship by a pump; a step of causing seawater to flow in by opening a dock gate of the dry dock so that the launch vessel is floated and the part of the launch vessel is not floated; a step of moving the floating launch vessel to the external bank wall of the dock gate; a step of discharging seawater from the dry dock by closing the dock gate; and performing engineering of the remaining hull portion of the partially launched vessel at the same location.
Description
Technical Field
The present invention relates to a ship construction process for a dry dock non-floating tandem process, which is suitable for constructing a ship of the same type or different types in the same dry dock, and which can not only simultaneously construct a launch ship and a part of the launch ship, but also stably ensure that the launch ship does not float while maintaining the equilibrium of the part of the launch ship when the launch ship is carried out, and which can prevent the launch of the launch ship from being affected by performing forced water injection to different degrees according to the construction steps of the part of the launch ship.
Background
It is known to construct a ship in a dry dock manner in order to construct a large ship efficiently, a ship segment may be constructed in the dry dock and the ship is floated by introducing seawater into the dry dock, thereby being carried out after being lifted to a shore wall.
In addition, a tandem process for simultaneously constructing a launch vessel and a portion of the launch vessel using the available space in the dry dock may be applied.
For example, in the case of a tandem process of a part of a launch vessel to which an oversized container vessel and an oversized crude oil transport Vessel (VLCC) are applied, when seawater is introduced into the interior of a dry dock, it may be unevenly inclined and floated to the stern end side due to buoyancy of a cargo area in which a bulkhead is formed in the part of the launch vessel, so that when the launch vessel is lifted by a tug, it may cause dumping of a support supporting the part of the launch vessel due to rotation of a propeller of the tug and further cause dumping of the part of the launch vessel, thus having a problem that the launch vessel and the part of the launch vessel of the oversized container vessel cannot be simultaneously built.
As a prior art for solving the problems as described above, korean registered patent publication No. 10-0796410 is disclosed as a dipping process applicable to a conventional tandem construction process, including: a step of constructing a ship segment in a dock through a tandem construction process; a step of installing main carrying objects such as a main engine, a tail shaft, an intermediate shaft, a stern section, a binding bridge or a hatch cover and the like in a ship to be immersed; a step of immersing the ship in water to the same position by naturally introducing water into the cargo ballast tanks and a part of the double bottom tanks of the immersed ship when the ship is floating; and a step of constructing a submerged ship after pulling the launch ship; the construction can be completed at the same location without moving the hull by immersing the hull after all the cargo is loaded.
However, in a state where the main cargo is mounted on a part of the launch vessel, the water which flows in to float the launch vessel naturally flows into the cargo ballast tanks and a part of the double bottom tanks, and thus the launch vessel can be launched only after all the main cargo is mounted on the part of the launch vessel, as shown in fig. 1, and therefore, even in a state where the construction of the launch vessel is completed, the lifting time of the launch vessel may be delayed according to the construction steps of the part of the launch vessel, and the water which naturally flows into the dock, that is, the seawater may cause the sinking of the part of the launch vessel, and thus the hull may corrode due to salt and chlorine, and therefore, a pre-engineering or a post-engineering for preventing the hull corrosion may be required to be performed and finally the construction period may be delayed to a problem.
For this reason, there is a need for an improved in-line process that can hoist a launch vessel independently of the construction steps of a portion of the launch vessel, thereby minimizing construction delays and minimizing hull corrosion caused by the flooding of a portion of the launch vessel.
Disclosure of Invention
The technical problem to be achieved by the concept of the invention is to provide a ship construction process applicable to a dry dock non-floating tandem process, which can hoist a launch ship irrespective of the construction steps of a part of the launch ship, thereby minimizing a delay in construction period and minimizing corrosion of the hull caused by the soaking of the part of the launch ship.
To achieve the above object, the present invention provides a ship construction process adapted to a dry dock non-floating tandem process, comprising: respectively constructing a plurality of ship segments of the same type or different types in one or two rows in the same dry dock, performing a part of ship hull engineering of the launch ship in a dock adjacent area, and performing a part of ship hull engineering of the launch ship in a dock adjacent area; a step of forcibly injecting water into the part of the launch ship by a pump; a step of causing seawater to flow in by opening a dock gate of the dry dock so that the launch vessel is floated and the part of the launch vessel is not floated; a step of moving the floating launch vessel to the external bank wall of the dock gate; a step of discharging seawater from the dry dock by closing the dock gate; and performing engineering of the remaining hull portion of the partially launched vessel at the same location.
Wherein fresh water or seawater may be forcibly injected into the interior of the cargo hold formed with the bulkhead in the partial launch vessel by the pump in order to offset the buoyancy of the partial launch vessel and maintain equilibrium with the center of gravity (COG).
In this case, when the deck house and the nacelle cover of the partially launched vessel are mounted, water may be forcibly injected into a pair of left and right Side Crude Oil (SCO) tanks adjacent to the nacelle cover, respectively, and when the deck house and the nacelle cover of the partially launched vessel are not mounted, a large amount of water may be forcibly injected into a pair of left and right Side Crude Oil (SCO) tanks adjacent to the nacelle cover, respectively, and the remaining water may be forcibly injected into a pair of left and right oil-water tanks, respectively.
In addition, fresh water or seawater may be forcibly injected into the Side Crude Oil (SCO) tank and the oily water tank.
In addition, when the seawater is forcibly injected, the seawater may be injected after the salt and chlorine are removed by the seawater desalination plant.
Furthermore, it may further include: and executing the hull part engineering of the subsequent ship at the launch position.
In the present invention, it is possible to minimize corrosion of a ship hull while preventing a part of a launch vessel from floating by forcibly injecting fresh water or seawater alone, and when constructing vessels of the same type or different types in the same dry dock, it is possible to construct not only a launch vessel and a part of a launch vessel at the same time, but also stably secure a part of a launch vessel from floating while maintaining an equilibrium state thereof when the launch vessel is carried out, and it is possible to prevent an influence on the launch of a launch vessel by forcibly injecting water to different extents according to a construction step of a part of a launch vessel, thereby continuously constructing a large-scale construction vessel while shortening a construction period by a serial process.
Drawings
Fig. 1 illustrates a flooding process suitable for use in a tandem construction process based on the prior art.
Fig. 2 illustrates a sequence diagram of a ship construction process for a dry dock non-floating tandem process, to which embodiments of the present invention are applied.
Fig. 3 schematically illustrates a dry dock implementing the ship building process of fig. 2 for which the dry dock non-floating tandem process is applicable.
Fig. 4 illustrates a stern cross-sectional structure of a portion of the launch vessel of fig. 2 for a vessel construction process employing a dry dock non-floating tandem process.
Fig. 5 illustrates an engineering flow diagram of the non-floating tandem process in the dry dock of fig. 3, respectively.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those having ordinary skill in the art to which the present invention pertains can easily practice the present invention. The present invention may be realized in many different forms and is not limited to the embodiments described herein.
Referring to fig. 2, the ship construction process according to the embodiment of the present invention, which is applicable to the dry dock non-floating tandem process, generally includes a hull engineering and hull part engineering performing step S110, a forced water injection step S120, a seawater inflow step S130, a launch ship carrying-out step S140, a seawater draining step S150, a remaining hull part engineering performing step S160, and a subsequent ship hull part engineering performing step S170, and is characterized in that continuous tandem construction of a ship can be achieved.
Next, a ship construction process applicable to a dry dock non-floating tandem process according to an embodiment of the present invention will be described in detail with reference to fig. 2 to 5.
First, in the hull engineering and hull part engineering execution step S110, as shown in fig. 3 and 5 (a), a plurality of ship segments of the same type of ship or different types of ships are respectively built in one or two columns in the same dry dock, a hull engineering of a part of the launch ship is executed in a dock (dock head) adjacent area, and a hull part engineering of the launch ship is executed in a dock gate (dock) adjacent area.
The launch vessel or a part of the launch vessels are not particularly limited, and may be, for example, a very large crude oil carrier (VLCC; very Large Crude oil Carrier), a very large container vessel, a Liquefied Natural Gas (LNG) carrier, a Liquefied Natural Gas (LNG) power vessel, or a large construction vessel of a chemical product carrier, etc., and the launch vessels having a total length (LOA; length Of Overall) of about 400m and a part of the launch vessels having a total length of about 120m may be constructed simultaneously in one or two lines in the same dry dock having a length of 500m or more.
For reference, the interval between the dock and a part of the launch vessel and the distance between the dock gate and the launch vessel need to be maintained at an interval of about 5m, and the interval between a part of the launch vessel and the launch vessel needs to be maintained at an interval of about 10 m.
Next, in the forced water injection step S120, as shown in fig. 3, water can be injected into the interior of the partially launched vessel by the pump P, thereby ensuring that the bow of the partially launched vessel, i.e., the partially launched vessel, does not float due to its own buoyancy when seawater flows into the interior of the dock.
That is, in order to offset buoyancy of a part of the launch vessel under the density of seawater varying according to water temperature and salinity as well as water pressure and maintain equilibrium with a center of gravity (COG), fresh water or seawater is forcibly injected into the interior of a tank (cargo tank) formed with a bulkhead of the part of the launch vessel by a pump P, thereby ensuring that the part of the launch vessel remains in place and is prevented from floating from a support (support) for preventing the section of the vessel from being toppled.
Further, referring to fig. 4, in the case of carrying a deckhouse (D/H) a and a cabin shed (engine House) B of a part of a launch vessel at the time of forced water injection, water is forcibly injected into a pair of left and right Side Crude Oil (SCO) cabins (SCO TK (P), (S)) adjacent to a bow part of the launch vessel, that is, the cabin shed B, respectively, and, for example, a very large crude oil carrier (VLCC), it is possible to prevent the bow part of the launch vessel from floating up by injecting water of about 8000 tons, while maintaining the balance with the gravity Center (COG) in which the center of gravity tends to the rear end of the stern, thereby avoiding the phenomenon of partial floating up due to unbalanced inclination of the front and rear parts of the stern. For example, 8000 tons of No.5SCO TK (P) may be injected and 7,950 tons of No.5SCO TK (S) may be injected, thereby adding up to 15,950 tons.
Alternatively, in the case of the deck house a and the cabin shed B of the launch vessel without the loading portion, the gravity Center (COG) tends to be at a lower level than the stern rear end when loaded, and therefore, most of the water is forcibly injected into the pair of left and right crude oil (SCO) tanks adjacent to the cabin shed B, and the surplus water is forcibly injected into the pair of left and right oil-water tanks (chop TK (P), (S)), respectively, and the phenomenon of partial floating due to unbalanced inclination of the front and rear portions of the stern is avoided by injecting the pair of left and right SCO tanks with about 7000 tons, respectively, and about 800 tons, respectively, for example, to the oversized crude oil carrier (VLCC), while preventing the stern from floating. For example, 7100 tons of water can be injected into No.5SCO TK (P, S) and 860 tons of water can be injected into SLOP TK (P), and 750 tons of water can be injected into SLOP TK (S), so as to add 15810 tons in total.
Wherein fresh water or seawater can be forcibly injected into a Side Crude Oil (SCO) tank and a dirty oil water tank by a pump P, and water can be injected after salt and chlorine are removed by a seawater desalination device in order to minimize corrosion of a hull due to salt and chlorine when the seawater is forcibly injected.
For this reason, it is possible to forcibly inject fresh water or seawater in various ways according to the construction steps of the partial launch vessel, thereby stably ensuring that the partial launch vessel does not float in a state where equilibrium thereof is maintained, and minimizing a construction period delay because it does not affect the launch of the launch vessel.
For reference, although the case where the pump P is mounted in a dry dock is illustrated, water may be forcibly injected by a part of a water-launched vessel, and the oil-and-sewage tank is a tank for storing an oily mixture of oil and seawater formed after washing various tanks or waste oil flowing out from an engine compartment, and is disposed in order to prevent marine pollution due to oil stains and reduce loss of cargo.
Further, in the seawater inflow step S130, as shown in (b) of fig. 5, the seawater can be flowed in by opening the dock gate of the dry dock and the launch vessel is floated, and a part of the launch vessel is maintained in a non-floating state at the original position.
Further, in the launch ship carrying-out step S140, as shown in fig. 3 and (c) in fig. 5, the floating launch ship is hoisted to the external wall of the dock gate by a tug.
Further, in the sea water draining step S150, sea water is drained from the dry dock by closing the dock gate.
Further, in the remaining hull part engineering execution step S160, as shown in (d) of fig. 5, fresh water or seawater forcibly injected into a part of the launch vessel is discharged, and the remaining hull part engineering of the part of the launch vessel is executed at the same position where the water is immersed, thereby completing the construction of the launch vessel.
Further, in the subsequent ship hull part engineering execution step S170, as shown in fig. 5 (d), the subsequent ship hull part engineering is executed at the carry-out position of the launch ship.
By this, with the construction of the ship construction process to which the dry dock non-floating tandem process is applied as described above, compared with the prior art in which the part of the launch ship carrying the main carrying object is submerged by natural inflow of seawater in order to float the launch ship by the submerged process, the part of the launch ship can be prevented from floating while minimizing corrosion of the hull by forcibly injecting fresh water or seawater alone, and when the same type or different types of ships are constructed in the same dry dock, not only the launch ship and the part of the launch ship can be constructed simultaneously, but also the launch ship can be stably ensured not to float in a state where the equilibrium of the part of the launch ship is maintained when the launch ship is carried out, and the effect on the launch of the launch ship can be prevented by forcibly injecting water to a different degree according to the construction steps of the part of the launch ship, and further, the large-scale construction ship can be constructed continuously while shortening the construction period by the tandem process.
In the foregoing, the invention is described in detail with reference to the accompanying drawings. However, the present invention is not limited thereto, and those having ordinary skill in the art to which the present invention pertains may implement various modifications and embodiments within the scope equivalent to the present invention. Accordingly, the true scope of the invention should be defined by the following claims.
Claims (5)
1. A ship building process adapted for a dry dock non-floating tandem process, comprising:
respectively constructing a plurality of ship segments of the same type or different types in one or two rows in the same dry dock, performing a part of ship hull engineering of the launch ship in a dock adjacent area, and performing a part of ship hull engineering of the launch ship in a dock adjacent area;
a step of forcibly injecting water into the partially launched vessel by a pump before the dock gate of the dry dock is opened to allow seawater to flow in;
a step of causing seawater to flow in by opening a dock gate of the dry dock so that the launch vessel is floated and the part of the launch vessel is not floated;
a step of moving the floating launch vessel to the external bank wall of the dock gate;
a step of discharging seawater from the dry dock by closing the dock gate; the method comprises the steps of,
the step of engineering the remaining hull part of the partially launched vessel is performed at the same location,
wherein in the step of forcibly filling water into the interior of the partially launched vessel by means of a pump,
in order to offset buoyancy of the partial launch vessel and maintain equilibrium with the center of gravity, fresh water or seawater is forcibly injected into the interior of the cargo space in which the bulkhead is formed in the partial launch vessel by the pump, and the cargo space and the water injection amount to be forcibly injected with fresh water or seawater are variously determined according to the construction steps of the partial launch vessel.
2. The ship building process adapted for a dry dock non-floating tandem process according to claim 1, wherein:
when the deck house and the cabin shed of the part of the launch ship are mounted, fresh water or seawater is forcibly injected into a pair of left and right crude oil tanks adjacent to the cabin shed.
3. The ship building process adapted for a dry dock non-floating tandem process according to claim 1, wherein:
when the deck house and the cabin shed of the part of the launch ship are not mounted, most fresh water or seawater is forcibly injected into a pair of left and right crude oil tanks adjacent to the cabin shed, and the rest fresh water or seawater is forcibly injected into a pair of left and right oil sewage tanks.
4. A ship building process adapted for a dry dock non-floating tandem process according to claim 2 or claim 3, wherein:
when the seawater is forcibly injected, the seawater is injected after the salt and chlorine are removed by the seawater desalination device.
5. The ship building process for a dry dock non-floating tandem process according to claim 1, further comprising:
and executing the hull part engineering of the subsequent ship at the launch position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190174629A KR102157346B1 (en) | 2019-12-26 | 2019-12-26 | Method for shipbuilding by adapting non-floating tandem in dry dock |
| KR10-2019-0174629 | 2019-12-26 | ||
| PCT/KR2020/011740 WO2021132840A1 (en) | 2019-12-26 | 2020-09-02 | Shipbuilding method employing non-floating tandem method in dry dock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114787031A CN114787031A (en) | 2022-07-22 |
| CN114787031B true CN114787031B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202080085969.7A Active CN114787031B (en) | 2019-12-26 | 2020-09-02 | Ship construction process suitable for dry dock non-floating type serial connection process |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7341627B2 (en) |
| KR (1) | KR102157346B1 (en) |
| CN (1) | CN114787031B (en) |
| WO (1) | WO2021132840A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115611367A (en) * | 2021-02-22 | 2023-01-17 | 中印恒盛(北京)贸易有限公司 | Cell type ship bearing circulating water treatment unit |
| CN113186956B (en) * | 2021-04-01 | 2022-11-29 | 中交第四航务工程局有限公司 | Construction method for floating installation of dock gate and construction method for floating deposition of dock gate |
| CN114435554B (en) * | 2022-03-17 | 2022-11-08 | 广船国际有限公司 | Semi-ship floating method |
| CN114753297B (en) * | 2022-04-11 | 2024-02-02 | 中国铁建港航局集团有限公司 | Novel dock wall connecting structure and construction method thereof |
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- 2019-12-26 KR KR1020190174629A patent/KR102157346B1/en active IP Right Grant
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- 2020-09-02 WO PCT/KR2020/011740 patent/WO2021132840A1/en active Application Filing
- 2020-09-02 JP JP2022532583A patent/JP7341627B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102157346B1 (en) | 2020-09-18 |
| WO2021132840A1 (en) | 2021-07-01 |
| JP7341627B2 (en) | 2023-09-11 |
| CN114787031A (en) | 2022-07-22 |
| JP2023504152A (en) | 2023-02-01 |
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Address after: Geoje, Gyeongsangnam-do, South Korea Applicant after: Hanhua Ocean Co.,Ltd. Address before: Geoje, Gyeongsangnam-do, South Korea Applicant before: DAEWOO SHIPBUILDING & MARINE ENGINEERING Co.,Ltd. |
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