CN108327847B - Method for transforming buoyancy tank of semi-submersible ship - Google Patents
Method for transforming buoyancy tank of semi-submersible ship Download PDFInfo
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- CN108327847B CN108327847B CN201810016097.3A CN201810016097A CN108327847B CN 108327847 B CN108327847 B CN 108327847B CN 201810016097 A CN201810016097 A CN 201810016097A CN 108327847 B CN108327847 B CN 108327847B
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- buoyancy tank
- buoyancy
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- pontoons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B83/00—Rebuilding or retrofitting vessels, e.g. retrofitting ballast water treatment systems
Abstract
The invention relates to a method for reforming a buoyancy tank of a semi-submersible ship, which is characterized in that an original buoyancy tank is longitudinally or transversely cut to form a first buoyancy tank and a second buoyancy tank; welding outer plates of cutting surfaces of the first buoyancy tank and the second buoyancy tank to ensure that the first buoyancy tank and the second buoyancy tank are still in watertight pressure-resistant tank body structures; respectively adding a first top buoyancy tank and a first bottom buoyancy tank at the top and the bottom of the first buoyancy tank; respectively adding a second top buoyancy tank and a second bottom buoyancy tank at the top and the bottom of the second buoyancy tank; the first buoyancy tank and the second buoyancy tank are relocated on the deck. The method for transforming the floating box of the semi-submersible ship can enable the semi-submersible ship to be more stable and reliable, and can meet the requirements of loading and transporting large goods.
Description
Technical Field
The invention relates to an improvement method of a ship hull buoyancy tank, in particular to a method for modifying a buoyancy tank of a semi-submersible ship.
Background
A semi-submersible ship is an ocean engineering ship for transporting large structures on the sea. The semi-submersible ship is basically characterized by consisting of a main hull, a buoyancy body (generally a high-rise bow building or stern building) where an superstructure is located and a buoyancy tank (generally a stern buoyancy tank).
The diving working condition requires that the stability of the semi-submersible ship is sufficient, safe and reliable, the stern buoyancy tank or the bow buoyancy tank must be capable of providing sufficient water line surface inertia moment, and an initial stability high value meeting the standard or use requirement is provided for diving, and the design of the buoyancy tank is very important. In order to meet the requirements of loading and unloading heavy goods such as large offshore structures and the like, the buoyancy tank needs to take various factors such as space size, weight range, reserve buoyancy and the like into consideration.
As the size of part of ultra-large structures or ship-shaped goods exceeds the loading and unloading capacity of the semi-submersible ship, higher requirements are provided for the bearing capacity, the space size, the weight range and the reserve buoyancy of the semi-submersible ship, and the buoyancy tanks used by the traditional semi-submersible ship are difficult to meet the higher requirements.
Disclosure of Invention
The invention aims to provide a method for modifying a buoyancy tank of a semi-submersible ship, which solves the technical problems;
the technical problem solved by the invention can be realized by adopting the following technical scheme:
a method for reforming a buoyancy tank of a semi-submersible ship comprises the following steps:
the method comprises the following steps: longitudinally cutting an original ship buoyancy tank to form two buoyancy tanks which are respectively a first buoyancy tank and a second buoyancy tank;
step two: performing outer plate welding on cutting surfaces of the first buoyancy tank and the second buoyancy tank to ensure that the first buoyancy tank and the second buoyancy tank are still in watertight pressure-resistant tank body structures;
step three: respectively adding a first top buoyancy tank and a first bottom buoyancy tank at the top and the bottom of the first buoyancy tank;
step four: respectively adding a second top buoyancy tank and a second bottom buoyancy tank at the top and the bottom of the second buoyancy tank;
step five: relocating the first and second pontoons on a deck with the long sides of the first and second pontoons parallel to the mid-longitudinal line of the deck, the first and second pontoons being secured within a strong frame.
Further, in the first step, the central buoyancy tank is longitudinally cut along a median line, and the first buoyancy tank and the second buoyancy tank have the same volume.
Further, the first buoyancy tank and the second buoyancy tank are of rectangular box structures with the same length, width and height.
A method for reforming a buoyancy tank of a semi-submersible ship comprises the following steps:
the method comprises the following steps: transversely cutting an original ship buoyancy tank to form two buoyancy tanks which are respectively a first buoyancy tank and a second buoyancy tank;
step two: performing outer plate welding on cutting surfaces of the first buoyancy tank and the second buoyancy tank to ensure that the first buoyancy tank and the second buoyancy tank are still in watertight pressure-resistant tank body structures;
step three: respectively adding a third top buoyancy tank and a third bottom buoyancy tank at the top and the bottom of the first buoyancy tank;
step four: respectively adding a fourth top buoyancy tank and a fourth bottom buoyancy tank to the top and the bottom of the second buoyancy tank;
step five: relocating the first and second pontoons on a deck with the long sides of the first and second pontoons parallel to the mid-longitudinal line of the deck, the first and second pontoons being secured within a strong frame.
Further, in the first step, the central buoyancy tank is transversely cut along a central parting line, and the first buoyancy tank and the second buoyancy tank have the same volume.
Further, the first buoyancy tank and the second buoyancy tank are of rectangular box structures with the same length, width and height.
Has the advantages that: by adopting the technical scheme, the method for transforming the floating box of the semi-submersible ship longitudinally cuts the original floating box, arranges the longitudinal outer wall on the cut floating box sheet body and arranges the longitudinal outer wall along the ship side, or additionally adds the outboard base to hang the cut floating box outside the ship, so that the available clear width of the cargo deck of the semi-submersible ship is increased as much as possible, and the method is favorable for adapting to the ultra-wide and ultra-long heavy goods which enter and exit the semi-submersible ship longitudinally.
According to the method for modifying the floating box of the semi-submersible ship, the original floating box is transversely cut, the transverse outer wall is matched with the cut floating box body and is arranged along the single side of the bow and the stern, the available net length of a cargo deck of the semi-submersible ship is increased as much as possible, and the method is favorable for adapting to larger heavy goods transversely entering and exiting the semi-submersible ship.
Drawings
Fig. 1 is a schematic diagram of a longitudinal cutting structure of a pontoon in a method for modifying a pontoon of a semi-submersible vessel according to the invention, wherein a first pontoon and a second pontoon are cut but not rearranged.
FIG. 2 is a left side view of a longitudinal cut of a pontoon in a method of reconstructing a pontoon of a semi-submersible vessel according to the invention.
FIG. 3 is a top view of a longitudinal cut of a pontoon according to a method of rebuilding a pontoon of a semi-submersible vessel according to the invention, wherein the first and second pontoons have been cut and rearranged.
Fig. 4 is a schematic diagram of a transverse cutting structure of the buoyancy tanks in the method for modifying the buoyancy tank of the semi-submersible vessel, wherein the first buoyancy tank and the second buoyancy tank are cut but not rearranged.
FIG. 5 is a left side view of a transverse cut of a pontoon according to a method of modifying a pontoon of a semi-submersible vessel of the invention.
FIG. 6 is a top view of a longitudinal cut of a pontoon in a method of rebuilding a pontoon of a semi-submersible vessel according to the invention, wherein the first and second pontoons have been cut and rearranged.
Reference numerals: 1. a deck; 2. an original buoyancy tank; 3. a longitudinal cutting line; 4. a first buoyancy tank; 41. a first top buoyancy tank; 42. a first bottom buoyancy tank; 5. a second buoyancy tank; 51. a second top buoyancy tank; 52. a second bottom buoyancy tank; 6. a strong frame; 7. a transverse cutting line; 4', a first buoyancy tank; 41', a first top buoyancy tank; 42', a first bottom buoyancy tank; 5', a second buoyancy tank; 51', a second top buoyancy tank; 52' and a second bottom buoyancy tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Referring to fig. 1-3, there is shown a preferred embodiment of a method of modifying a pontoon of a semi-submersible vessel, comprising the steps of:
the method comprises the following steps: longitudinally cutting the original buoyancy tank 2 to form two buoyancy tanks, namely a first buoyancy tank 4 and a second buoyancy tank 5;
step two: performing outer plate welding on cutting surfaces of the first buoyancy tank 4 and the second buoyancy tank 5 to ensure that the first buoyancy tank 4 and the second buoyancy tank 5 are still in watertight pressure-resistant tank body structures;
step three: adding a first top buoyancy tank 41 and a first bottom buoyancy tank 42 to the top and the bottom of the first buoyancy tank 4 respectively;
step four: a second top buoyancy tank 51 and a second bottom buoyancy tank 52 are additionally arranged at the top and the bottom of the second buoyancy tank 5 respectively;
step five: the first buoyancy tank 4 and the second buoyancy tank 5 are relocated on the deck 1, the long sides of the first buoyancy tank 4 and the second buoyancy tank 5 are parallel to the mid-longitudinal line of the deck 1, and the first buoyancy tank 4 and the second buoyancy tank 5 are fixed within a strong frame 6.
In a preferred embodiment, in the first step, the central buoyancy tank 1 is cut longitudinally along a midline, and the first buoyancy tank 4 and the second buoyancy tank 5 have the same volume.
Further, the first buoyancy tank 4 and the second buoyancy tank 5 are rectangular box structures with the same length, width and height.
The first buoyancy tank 4 and the second buoyancy tank 5 are integrally and longitudinally cut from the original buoyancy tank 2, and as for the cutting ratio, there are various forms, and a half-cut form is exemplified in the embodiment, and the longitudinal cutting line 3 of this cut form is located between the first buoyancy tank 4 and the second buoyancy tank 5, and the first buoyancy tank 4 and the second buoyancy tank 5 have the same volume.
It is more convenient to arrange if the first buoyancy tank 4 and the second buoyancy tank 5 have the same volume.
4-6, there is shown a preferred embodiment semi-submersible vessel pontoon conversion method including the steps of:
the method comprises the following steps: transversely cutting the original buoyancy tank 2 to form two buoyancy tanks, namely a first buoyancy tank 4 'and a second buoyancy tank 5';
step two: performing outer plate welding on cutting surfaces of the first buoyancy tank 4 'and the second buoyancy tank 5' to ensure that the first buoyancy tank 4 'and the second buoyancy tank 5' are still in watertight pressure-resistant tank body structures;
step three: respectively adding a third top buoyancy tank 41 'and a third bottom buoyancy tank 42' to the top and the bottom of the first buoyancy tank 8;
step four: adding a fourth top buoyancy tank 51 ' and a fourth bottom buoyancy tank 52 ' to the top and the bottom of the second buoyancy tank 5 ' respectively;
step five: the first buoyancy tank 4 'and the second buoyancy tank 5' are relocated on the deck 1, the long sides of the first buoyancy tank 4 'and the second buoyancy tank 5' being parallel to the median longitudinal line of the deck 1, the first buoyancy tank 4 'and the second buoyancy tank 5' being fixed within a strong frame 6.
In a preferred embodiment, in the first step, the central buoyancy tank 2 is transversely cut along the midline, and the first buoyancy tank 4 'and the second buoyancy tank 5' have the same volume.
Further, the first buoyancy tank 4 'and the second buoyancy tank 5' are rectangular box structures with the same length, width and height.
The first buoyancy tank 4 'and the second buoyancy tank 5' are integrally cut from the original buoyancy tank 2, and as for the cutting ratio, there are various forms, and a half-cut form is exemplified in the embodiment, and a transverse cutting line 7 of this cut form is cut in the middle of the first buoyancy tank 4 'and the second buoyancy tank 5', and the first buoyancy tank 4 'and the second buoyancy tank 5' have the same volume.
It is more convenient to arrange if the first buoyancy tank 4 'and the second buoyancy tank 5' have the same volume.
No matter the original buoyancy tank 2 is transversely cut or longitudinally cut, in order to guarantee the reserve buoyancy, the buoyancy tank after partial cutting can adopt an additional base or a cofferdam.
In order to meet the requirements of the original buoyancy tank ballast pipe system and the power consumption of equipment on the top of the buoyancy tank, the original buoyancy tank ballast and power supply pipeline is adjusted according to the new shape and the new arrangement position.
In order to ensure that equipment such as a winch and a crane on the top of the original buoyancy tank can be continuously and effectively used, the buoyancy tank is rearranged according to the position of the buoyancy tank with the similar shape after being cut or newly manufactured.
The method for longitudinally or transversely cutting the buoyancy tank of the semi-submersible ship changes the shape of the waterline surface of the original buoyancy tank, provides the inertia moment of the waterline surface again and counts the influence of the free liquid level for stability calculation.
In addition, the transverse cutting and the longitudinal cutting in the present invention are viewed from above in terms of the ship body advancing direction.
In conclusion, the method for modifying the floating box of the semi-submersible ship provided by the invention longitudinally cuts the original floating box, arranges the longitudinal outer wall on the cut floating box sheet body, arranges the longitudinal outer wall along the ship side, or additionally arranges an outboard base to hang the cut floating box outside the ship side, increases the available net width of the cargo deck 1 of the semi-submersible ship as much as possible, and is favorable for adapting to the ultra-wide and ultra-long heavy cargos longitudinally entering and exiting the semi-submersible ship.
According to the method for modifying the floating box of the semi-submersible ship, the original floating box is transversely cut, the transverse outer wall is matched with the cut floating box body and is arranged along the single side of the stern or the bow, the available net length of the cargo deck 1 of the semi-submersible ship is increased as much as possible, and the method is favorable for adapting to larger heavy goods transversely entering and exiting the semi-submersible ship or is arranged in a rearrangement mode similar to the original floating box longitudinally cut.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (2)
1. A method for reforming a buoyancy tank of a semi-submersible ship is characterized by comprising the following steps:
the method comprises the following steps: longitudinally cutting an original buoyancy tank to form two buoyancy tanks which are respectively a first buoyancy tank and a second buoyancy tank;
step two: performing outer plate welding on cutting surfaces of the first buoyancy tank and the second buoyancy tank to ensure that the first buoyancy tank and the second buoyancy tank are still in watertight pressure-resistant tank body structures;
step three: respectively adding a first top buoyancy tank and a first bottom buoyancy tank at the top and the bottom of the first buoyancy tank;
step four: respectively adding a second top buoyancy tank and a second bottom buoyancy tank at the top and the bottom of the second buoyancy tank;
step five: relocating the first and second pontoons on a deck with the long sides of the first and second pontoons parallel to the mid-longitudinal line of the deck, the first and second pontoons being secured within a strong frame;
in the first step, the original buoyancy tank is longitudinally cut along a median line, and the first buoyancy tank and the second buoyancy tank have the same volume;
the first floating box and the second floating box are of cuboid box structures with the same length, width and height.
2. A method for reforming a buoyancy tank of a semi-submersible ship is characterized by comprising the following steps:
the method comprises the following steps: transversely cutting an original buoyancy tank to form two buoyancy tanks which are respectively a first buoyancy tank and a second buoyancy tank;
step two: performing outer plate welding on cutting surfaces of the first buoyancy tank and the second buoyancy tank to ensure that the first buoyancy tank and the second buoyancy tank are still in watertight pressure-resistant tank body structures;
step three: respectively adding a first top buoyancy tank and a first bottom buoyancy tank at the top and the bottom of the first buoyancy tank;
step four: respectively adding a second top buoyancy tank and a second bottom buoyancy tank at the top and the bottom of the second buoyancy tank;
step five: relocating the first and second pontoons on a deck with the long sides of the first and second pontoons parallel to the mid-longitudinal line of the deck, the first and second pontoons being secured within a strong frame;
in the first step, the original buoyancy tank is transversely cut along a median line, and the first buoyancy tank and the second buoyancy tank have the same volume;
the first floating box and the second floating box are of cuboid box structures with the same length, width and height.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810016097.3A CN108327847B (en) | 2018-01-08 | 2018-01-08 | Method for transforming buoyancy tank of semi-submersible ship |
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| CN201810016097.3A CN108327847B (en) | 2018-01-08 | 2018-01-08 | Method for transforming buoyancy tank of semi-submersible ship |
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| CN108327847A CN108327847A (en) | 2018-07-27 |
| CN108327847B true CN108327847B (en) | 2020-09-29 |
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| CN103112553B (en) * | 2013-02-04 | 2015-11-25 | 大连海事大学 | The latent maintenance and repair ship of self-propulsion type half and using method |
| CN104229084B (en) * | 2013-06-08 | 2016-12-28 | 上海船舶运输科学研究所 | A kind of head and the tail floating box type shipbuilding platform |
| CN105836061A (en) * | 2016-03-21 | 2016-08-10 | 中国船舶工业集团公司第七○八研究所 | Self-lifting semi-submersible type underwater working platform |
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