CN112265611A - Design method of on-port ballast tank of super-tanker - Google Patents
Design method of on-port ballast tank of super-tanker Download PDFInfo
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- CN112265611A CN112265611A CN202011171615.2A CN202011171615A CN112265611A CN 112265611 A CN112265611 A CN 112265611A CN 202011171615 A CN202011171615 A CN 202011171615A CN 112265611 A CN112265611 A CN 112265611A
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- ballast tank
- port
- harbor
- tank
- ballast
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- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- PZNPLUBHRSSFHT-RRHRGVEJSA-N 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCCCC(=O)O[C@@H](COP([O-])(=O)OCC[N+](C)(C)C)COC(=O)CCCCCCCCCCCCCCC PZNPLUBHRSSFHT-RRHRGVEJSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005493 welding type Methods 0.000 description 2
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 108010066114 cabin-2 Proteins 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
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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
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
- B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/04—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
- B63B43/06—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks
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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
- B63B71/00—Designing vessels; Predicting their performance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a design method of an on-port ballast tank of a super-tanker, which is characterized in that when the super-tanker arrives at a port and adopts single-point mooring, part of an empty tank is designed according to the requirements of corrosion, ventilation, ballast water injection and discharge and the like of the ballast tank, the empty tank is arranged as an on-port ballast tank, a propeller can be fully submerged by additionally injecting the ballast water into the on-port ballast tank, and the trim is less than 0.7 percent of the total length of a ship. The invention has the advantages that the structure and the design form of the empty cabin at the upper part of the fore-end cabin are modified, the existing empty cabin is fully utilized and upgraded to the special ballast cabin at the port from the empty cabin, and the design effect required by single-point mooring of the special port is achieved with lower cost.
Description
Technical Field
The invention relates to the technical field of ship design, in particular to a design method of an on-port ballast tank of a super-tanker.
Background
As one of the largest oil producing countries in the world, ports in saudi arabia are shuttled around oil tankers from all over the world for years. When these tankers are berthed at ports, there are ports that have special requirements on the buoyancy of the berthing vessels. The Ras Tanura port is used as one of Saudi Arabia main loading ports, and when a ship is berthed in a single-point mooring mode, the requirements of full immersion of a propeller, and no more than 0.7 percent of Loa (total length of the ship) in trim need to be met. When the supertanker with the conventional design is used for ballast berthing, the existing ballast tank is only relied on, and the two requirements of full submergence of the propeller and less than 0.7 percent of Loa in trim are difficult to meet at the same time no matter how ballast is carried out, and as an improvement idea, a shipyard can achieve the port requirement by reducing the diameter of the propeller or increasing the capacity of a first tip tank, but the two schemes can cause the design basis of the whole ship to be greatly changed, a large amount of time and energy are needed to be spent on discussing potential influences, and the design and construction change is large and the cost is high.
Disclosure of Invention
The invention aims to provide a design method of an on-port ballast tank of a supertanker.
The technical purpose of the invention is realized by the following technical scheme:
a design method of an on-port ballast tank of a super-tanker is characterized in that a part of empty tanks are designed according to the requirements of corrosion, ventilation, ballast water injection and discharge and the like of the ballast tank, the empty tanks are arranged to be on-port ballast tanks, and when the super-tanker arrives at a port and adopts single-point mooring, the performance indexes that the ship propeller is fully submerged and the trim is less than 0.7% of the total length of a ship can be simultaneously met by additionally injecting the ballast water into the on-port ballast tanks.
Preferably, the empty compartment is located above the fore-end compartment, below the sailor chamber and adjacent to the cargo compartment number 1.
Preferably, at least one surface valve communicated with the fore-peak tank is arranged at the bottom of the harbor ballast tank, the ballast water in the fore-peak tank overflows into the harbor ballast tank by opening the surface valve, and a control device of the surface valve is arranged on the pilot chamber or the upper deck to facilitate the operation of a crew.
Preferably, at least two air pipe heads are arranged in the harbor ballast tank, one ends of the air pipe heads are fixedly arranged at the front end and the rear end of the harbor ballast tank respectively, and the other ends of the air pipe heads are communicated with the external upper deck.
Preferably, at least two dangerous gas detection pipelines are arranged in the harbor ballast tank, and the dangerous gas detection pipelines are fixedly arranged at the upper part of the front end and the lower part of the rear end of the harbor ballast tank respectively.
Preferably, a depth measuring device is arranged in the harbor ballast tank and comprises a depth measuring pipe and a depth measuring tape, and a steel weight is hung below the depth measuring tape.
Preferably, the interior of the harbor ballast tank is protected by paint coating according to the PSPC coating standard.
Preferably, a plurality of sacrificial anodes are arranged inside the harbor ballast tank, and the sacrificial anodes are welded zinc blocks.
Preferably, the wall steel plates of each wall of the ballast tank in the harbor are increased by 5 to 15 percent of the thickness based on the standard of the empty tank so as to increase the corrosion performance of the ballast tank in the harbor.
Preferably, a liquid level meter and a water inlet alarm device are further arranged at the upper end of the harbor ballast tank.
In conclusion, the invention has the following beneficial effects: according to the invention, the structure and design form of the empty cabin at the upper part of the fore-end cabin are modified, the existing empty cabin is fully utilized and upgraded to the special ballast cabin at the port, and the design effect required by single-point mooring of the special port is achieved with low cost.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings, and the present embodiment is not to be construed as limiting the invention.
A design method of an on-port ballast tank of a super-tanker is characterized in that when the super-tanker arrives at a port and single-point mooring is adopted, requirements such as corrosion allowance, ventilation, ballast water injection and discharge and the like of the ballast tank are comprehensively considered, an empty tank is designed, part of the empty tank is set to be the on-port ballast tank 1, accordingly, larger ballast tank capacity is obtained when the port is moored, a propeller can be completely immersed by additionally injecting ballast water into the on-port ballast tank 1, and trim is smaller than 0.7% of the total length of a ship.
The empty cabin is located above a forward cabin 2, below a sailor long chamber 3 and adjacent to a No. 1 cargo hold, the empty cabin is generally L-shaped, the empty cabin needs to be subjected to a watertight test and a structural test to ensure the watertight performance, the watertight sealing performance and the water leakage prevention capability are kept under the action of certain water pressure, the floating state, the propeller immersion rate, the strength and the like under the new design are checked by using stability calculation and finite element calculation software, and the requirements of port and ship-level specifications are met.
The bottom of the harbor ballast tank 1 is provided with a surface valve 4 communicated with the forward tank 2, the surface valve is provided with one or more surface valves arranged in the harbor ballast tank 1, the ballast water in the forward tank 2 overflows into the harbor ballast tank 1 by opening the surface valve 4, and the surface valve 4 is closed under the condition that the harbor ballast tank 1 is not used, and the tank is isolated from the forward tank 2; when the empty tank is used as an on-port ballast tank 1, the surface valve is opened and the ballast water overflows into the tank after filling the fore-aft tank 2, and the control device of the surface valve 4 is arranged on the pilot's chamber 3 or on the upper deck for the convenience of the crew.
At least two air pipe heads 5 are arranged in the harbor ballast tank 1, one ends of the air pipe heads 5 are respectively and fixedly arranged at the front end and the rear end of the harbor ballast tank 1, the other ends 5 of the air pipe heads are communicated with an external upper deck, the air pipe heads 5 can keep an air-permeable pipeline smooth, the air pressure in the harbor ballast tank 1 is close to the atmospheric pressure through ventilation and air suction, and meanwhile, when a ship body inclines or meets storms, self-sealing can be realized, and air is prevented from entering the ship tank.
At least two dangerous gas detection pipelines 6 are arranged in the harbor ballast tank 1, the dangerous gas detection pipelines 6 are respectively and fixedly arranged at the upper part of the front end and the lower part of the rear end of the harbor ballast tank 1, because the storage time of cargoes is long, and due to the influence of changes of temperature, salinity, humidity and the like on the sea, a series of chemical or physical changes can easily occur to some cargoes, some poisonous and harmful gases such as carbon monoxide, sulfide, nitric oxide, hydrogen and the like are also generated along with the storage time of the cargoes, and if accidents such as leakage, collision, fire, explosion and the like occur, the consequences can not be. Also, materials such as paints and adhesives used in painting and lacquering processes generate various volatile harmful gases such as benzene and trichloroethane, and the toxic harmful gases are slowly accumulated due to relatively poor ventilation conditions in the harbor ballast tank 1, so that the environment in the harbor ballast tank 1 can be timely monitored through the two dangerous gas detection pipelines 6.
The thickness of each enclosure wall steel plate of the harbor ballast tank 1 is increased by 5% -15% on the basis of the empty tank standard so as to increase the corrosion resistance of the harbor ballast tank 1, paint coating protection is carried out in the harbor ballast tank 1 according to the PSPC coating standard so as to improve the corrosion resistance of the inner wall of the harbor ballast tank 1 and prolong the service life of the whole ballast tank, a plurality of sacrificial anodes 7 are arranged in the harbor ballast tank 1, the sacrificial anodes 7 are welding type zinc blocks, and the welding type zinc blocks are integrally welded with the inside of the harbor ballast tank 1, so that the corrosion resistance of the whole ballast tank is improved.
The depth measuring device is arranged in the harbor ballast tank 1 and comprises a depth measuring pipe and a depth measuring tape, a steel weight is hung below the depth measuring tape, a wet water mark is arranged on the surface of the depth measuring tape, the steel weight is lowered to the bottom of the tank along the inside of the depth measuring pipe during measurement, the water depth can be known by looking up the mark after the steel weight is pulled up, and the depth measuring device can detect the liquid filling and draining conditions in the harbor ballast tank 1 and determine the amount of ballast water in the harbor ballast tank 1.
Increase level gauge and alarm device 8 of intaking in the ballast tank 1 in the port, the level gauge is taken into water alarm device 8 and can in time monitor the liquid level in the cabin and the condition of intaking, sets up the chain lock for ballast water pipeline or 4 operation head wheels of surface valve to increase the warning data plate, be convenient for remind.
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 may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (10)
1. A design method of an on-port ballast tank of a super-tanker is characterized in that a part of empty tanks are designed according to the requirements of corrosion, ventilation, ballast water injection and discharge and the like of the ballast tank, the empty tanks are arranged to be on-port ballast tanks, and when the super-tanker arrives at a port and adopts single-point mooring, the performance indexes that the ship propeller is fully submerged and the trim is less than 0.7% of the total length of a ship can be simultaneously met by additionally injecting the ballast water into the on-port ballast tanks.
2. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: the empty cabin is located above the fore-peak cabin, below the sailor long chamber and adjacent to the No. 1 cargo cabin.
3. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: at least one surface valve communicated with the fore-and-aft tank is arranged at the bottom of the harbor ballast tank, ballast water in the fore-and-aft tank overflows into the harbor ballast tank by opening the surface valve, and a control device of the surface valve is arranged on a water man long room or an upper deck to facilitate the operation of a crew.
4. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: at least two air pipe heads are arranged in the harbor ballast tank, one ends of the air pipe heads are fixedly arranged at the front end and the rear end of the harbor ballast tank respectively, and the other ends of the air pipe heads are communicated with an external upper deck.
5. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: the system is characterized in that at least two dangerous gas detection pipelines are arranged in the harbor ballast tank and are respectively and fixedly arranged at the upper part of the front end and the lower part of the rear end of the harbor ballast tank.
6. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: the depth measuring device is arranged in the harbor ballast tank and comprises a depth measuring pipe and a depth measuring tape, and a steel weight is hung below the depth measuring tape.
7. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: and the inside of the harbor ballast tank is protected by paint coating according to the PSPC coating standard.
8. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: a plurality of sacrificial anodes are arranged in the harbor ballast tank and are welded zinc blocks.
9. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: the thickness of each enclosure wall steel plate of the ballast tank in the harbor is increased by 5 to 15 percent on the basis of the standard of an empty tank so as to increase the corrosion performance of the ballast tank in the harbor.
10. The method of designing an on-port ballast tank for a supertanker according to claim 1, wherein: and the upper end of the harbor ballast tank is also provided with a liquid level meter and a water inlet alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011171615.2A CN112265611A (en) | 2020-10-28 | 2020-10-28 | Design method of on-port ballast tank of super-tanker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011171615.2A CN112265611A (en) | 2020-10-28 | 2020-10-28 | Design method of on-port ballast tank of super-tanker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112265611A true CN112265611A (en) | 2021-01-26 |
Family
ID=74346085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011171615.2A Pending CN112265611A (en) | 2020-10-28 | 2020-10-28 | Design method of on-port ballast tank of super-tanker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112265611A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401452A (en) * | 2014-10-22 | 2015-03-11 | 大连船舶重工集团有限公司 | Large-sized oil product carrier based on novel header compartment design |
| CN109911101A (en) * | 2019-03-29 | 2019-06-21 | 广船国际有限公司 | A kind of ship stem structure |
| CN111268048A (en) * | 2020-02-27 | 2020-06-12 | 广船国际有限公司 | Ballast tank structure and ship |
| CN111284631A (en) * | 2020-02-28 | 2020-06-16 | 广船国际有限公司 | Bow structure of ship and ship |
-
2020
- 2020-10-28 CN CN202011171615.2A patent/CN112265611A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401452A (en) * | 2014-10-22 | 2015-03-11 | 大连船舶重工集团有限公司 | Large-sized oil product carrier based on novel header compartment design |
| CN109911101A (en) * | 2019-03-29 | 2019-06-21 | 广船国际有限公司 | A kind of ship stem structure |
| CN111268048A (en) * | 2020-02-27 | 2020-06-12 | 广船国际有限公司 | Ballast tank structure and ship |
| CN111284631A (en) * | 2020-02-28 | 2020-06-16 | 广船国际有限公司 | Bow structure of ship and ship |
Non-Patent Citations (1)
| Title |
|---|
| 王璐璐: "VLCC艏艉尖舱空舱化研究", 《现代国企研究》 * |
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Application publication date: 20210126 |
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| RJ01 | Rejection of invention patent application after publication |