CN113335475B - Deck bottom fixed pulley sliding platform dismantling process - Google Patents
Deck bottom fixed pulley sliding platform dismantling process Download PDFInfo
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- CN113335475B CN113335475B CN202110700119.XA CN202110700119A CN113335475B CN 113335475 B CN113335475 B CN 113335475B CN 202110700119 A CN202110700119 A CN 202110700119A CN 113335475 B CN113335475 B CN 113335475B
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- deck
- sliding platform
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- lifting
- hole
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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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
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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
- B63B85/00—Dismantling or scrapping vessels
Abstract
The invention discloses a process for dismantling a fixed pulley sliding platform under a deck, which comprises the following steps of transporting a cutting piece to the position below a deck hole by utilizing a roller trolley and a rail which are arranged on the sliding platform, and transporting the cutting piece to the deck by a winch on the deck; the sliding platform of the fixed pulley under the deck can be efficiently and safely cut off, the problem of dismantling high-risk lowering sling caused by the scheme of integrally lowering the sliding platform to the seabed is effectively solved, and the subsequent salvage operation caused by lowering the sliding platform to the seabed is avoided; cut apart and promote the platform that slides only need use a hoist engine, shortened constructor machines preparation time, got rid of whole transfer and needed two hoist engines to transfer the cooperation risk that brings, be used for promoting the transportation and transportation cutting member also fully avoided the destruction to platform structure and electric instrument pipeline in the deck hole, cut apart under the deck and demolish and lift the transportation work on the deck and can go on in step, greatly shortened and demolishd the engineering time, reserved sufficient time for follow-up fixed pulley debugging.
Description
Technical Field
The invention relates to the field of offshore oil engineering, in particular to a dismantling process for a fixed pulley sliding platform under a deck.
Background
In the truss type semi-submersible platform construction process, in order to lift and install a platform riser, a fixed pulley used for lifting and guiding is usually installed at the bottom of a platform deck, a platform used for sliding installation needs to be installed on the fixed pulley with large size and weight, the platform is spliced by a profile steel frame, and a vertical upright column on the sliding platform is welded with a platform deck main beam. In order to not influence the operation and debugging of the fixed pulley, the suspended fixed pulley sliding platform needs to be dismantled after the fixed pulley is installed. Because the sliding platform is hung below the bottom deck and is 60 meters away from the water surface, and the platform is in a long and thin square shape, the construction difficulty is huge in the method of integrally cutting off the sliding platform and using the platform upper crane to lower the sliding platform to the water bottom, two opening positions for lowering the steel wire rope are found, no obstacle is needed in the vertical direction of the lower opening from the top deck to the bottom deck, the structure of the sliding platform is seriously damaged, and the auxiliary part of the semi-submersible platform ship bypass is collided when the sliding platform is lowered; meanwhile, after the fixed pulley is placed to the bottom, subsequent fishing operation is required, the preparation of construction equipment facilities is complex, the dismantling period is long, and the subsequent debugging work of the fixed pulley is influenced. The high-altitude lowering operation difficulty and risk are huge.
Disclosure of Invention
The present invention is intended to solve the above technical problems to some extent.
In order to solve the technical problem, the invention provides a process for dismantling a fixed pulley sliding platform under a deck, which can dismantle the sliding platform.
The invention provides a process for dismantling a fixed pulley sliding platform under a deck, wherein the sliding platform is arranged below the deck, an upper deck is arranged above the deck, and the process is characterized in that: the method comprises the following steps:
a. a deck hole is formed in the deck corresponding to the middle of the sliding platform, a first lifting point is fixed on one side of the lower surface of the deck hole, a chain block is connected to the first lifting point, a second lifting point is fixed on one side of the upper surface of the deck hole, and a guide pulley is connected to the second lifting point;
b. fixing a third lifting point on the upper deck corresponding to the deck hole, wherein the third lifting point is connected with a lifting pulley;
c. arranging a winch on the deck, wherein a steel wire rope of the winch penetrates into the guide pulley from the ground, then penetrates into the lifting pulley, and is lowered to the sliding platform through the deck hole;
d. dividing the sliding platform into six areas, dismantling the areas, placing the dismantled components on a roller trolley, and transferring the components to the lower part of the deck hole through a pre-installed track;
e. and connecting two ends of a member with the tail ends of the chain block and the steel wire rope respectively, and then lifting the member to the deck.
Further, a reinforcing beam is fixed on the upper deck, a reinforcing rib plate is welded between the reinforcing beam and the upper deck, the third hanging point is welded on the lower edge of the reinforcing beam, and the third hanging point is opposite to the deck hole.
Furthermore, when the sliding platform is dismantled in a subarea mode, the upright column at the front end of the sliding platform is preferentially dismantled, then the vertical section steel at the foremost area of the sliding platform is dismantled, the sliding platform is cut and dismantled from two sides to the deck hole position one by one, the upright column and the section steel in one area are dismantled each time, and the upright column in the next area still can support the sliding platform.
Further, the tail end of the steel wire rope is connected with a counterweight lifting hook.
Further, the pipeline equipment around the deck hole is wrapped by rubber.
Furthermore, a track is fixed on the sliding platform, and a roller trolley is arranged on the track in a rolling mode.
Furthermore, a temporary scaffold is erected below the sliding platform.
Furthermore, the first lifting point is a lifting lug plate, and a shackle is connected between the chain block and the lifting lug plate.
The invention has the beneficial effects that: the fixed pulley sliding platform is cut and dismantled in different areas, a cutting piece is transported to the position below a deck hole by using a roller trolley and a rail which are arranged on the fixed pulley sliding platform, and the cutting piece is transported to the deck by a winch on the deck; the sliding platform of the fixed pulley under the deck can be efficiently and safely cut off, the problem of dismantling a high-risk lowering sling caused by the scheme of integrally lowering the sliding platform to the seabed is effectively solved, and the subsequent salvage operation caused by lowering the sliding platform to the seabed is avoided; cut apart and promote that sliding platform only need use a hoist engine, constructor machines preparation time has been shortened, the cooperation risk that whole transfer needs two hoist engines to transfer to bring has been got rid of, be used for promoting the transportation cutting member also fully to have avoided the destruction to platform structure and electric instrument pipeline at the deck hole, arrange the hoist engine at the deck, guide pulley, stiffening beam and lifting pulley are arranged to upper deck, abundant utilization on-deck construction space, hoist engine wire rope goes out the rope position and reserves out the top space, set up interim personnel passageway with the scaffold, cut apart under the deck and demolish and lift the transportation work on the deck and go on in step, demolish the engineering time greatly to have shortened, reserve sufficient time for follow-up fixed pulley debugging. The integral construction progress of the platform is accelerated. The platform and the scaffold are matched to cut and transport, and the risk of high-altitude operation of personnel is reduced. Has excellent feasibility and safety.
Drawings
FIG. 1 is a construction elevation schematic view of a deck bottom fixed pulley slipping platform demolition process of the invention;
FIG. 2 is a schematic construction plan view of a under-deck fixed pulley sliding platform dismantling process of the present invention;
FIG. 3 is a schematic view of a process column dismantling process of a fixed pulley sliding platform under a deck according to the present invention;
FIG. 4 is a schematic view of a process profile steel removing step of a fixed pulley sliding platform under a deck;
FIG. 5 is a schematic diagram of the division of the dismantling process of the fixed pulley sliding platform under the deck according to the present invention;
FIG. 6 is a schematic view of a design of a reinforcing beam for a deck bottom fixed pulley slipping platform dismantling process of the present invention;
FIG. 7 is a schematic layout of a temporary scaffold passing platform in a deck bottom fixed pulley sliding platform dismantling process of the present invention;
in the figure, 1-reinforcing beam; 2-a winch; 3-lifting the pulley; 4-a guide pulley; 5-lifting lug plates; 6-shackle removal; 7-a steel wire rope; 8-counterweight hook; 9-a cutting member; 10-chain block; 11-a trolley of rollers; 12-a slipping platform; 13-sliding platform front end column; 14-a plate hole; 15-a second hoisting point; 16-electrical instrument lines; 17-a first segmentation area; 18-a second segmentation zone; 18-a third segmentation zone; 19-a fourth segmentation zone; 20-a fifth segmentation zone; 21-a sixth segmented region; 22-temporary scaffold transit platform; 23-scaffold platform; 24-reinforcing plate; 25-electric instrument line.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
The invention provides a process for dismantling a fixed pulley sliding platform under a deck, wherein the sliding platform 12 is arranged below the deck, an upper deck is arranged above the deck, and the process comprises the following steps as shown in figures 1-7:
a. a deck hole 14 is formed in a deck corresponding to the middle of the sliding platform 12, a first lifting point is fixed on one side of the lower surface of the deck hole 14, a chain block 10 is connected to the first lifting point, a second lifting point 15 is fixed on one side of the upper surface of the deck hole 14, and a guide pulley 4 is connected to the second lifting point 15;
b. a third lifting point is fixed on the upper deck corresponding to the deck hole 14, and the third lifting point is connected with a lifting pulley 3;
c. a winch 2 is arranged on the deck, a steel wire rope 7 of the winch 2 penetrates into a guide pulley 4 from the ground, then penetrates into a lifting pulley 3 and is lowered to a sliding platform 12 through a deck hole 14;
d. dividing the sliding platform 12 into six areas, dismantling the areas, placing the dismantled components on the roller trolley 11, and transferring the components to the lower part of the deck hole 14 through a pre-installed track;
e. two ends of the component are respectively connected with the tail ends of the chain block 10 and the steel wire rope 7 and then lifted to the deck.
The invention provides a process for dismantling a fixed pulley sliding platform under a deck, which is shown in figures 1-7, and in the embodiment of the invention, attention is paid to: in step a, the deck hole 14 is opened on a beam lattice of the deck, and meanwhile, the electric instrument pipeline 16 needs to be avoided; a certain space is reserved above the steel wire rope 7 on the ground in the step d to build a temporary scaffold passing platform 22 for the passage of constructors; and a temporary scaffold platform 23 is arranged below the fixed pulley sliding platform 12 to be dismantled for cutting and assisting the personnel in transportation to stand. In this embodiment the skid platform 12 to be dismantled is divided into six parts, in turn a first division 17, a second division 18, a third division 19, a fourth division 20, a fifth division 21, a sixth division 22, deck holes 14 above the position of the fifth division 21,
the invention provides a process for dismantling a fixed pulley sliding platform under a deck, which is shown in figures 1-7.A reinforcing beam 1 is fixed on an upper deck, a reinforcing rib plate 24 is welded between the reinforcing beam 1 and the upper deck, a third lifting point is welded at the lower edge of the reinforcing beam 1, and the third lifting point is opposite to a deck hole 14. The arrangement of the reinforcement beam 1 on the upper deck as required ensures that the demolition element is prevented from hitting other accessories on the deck during the lifting process.
The invention provides a dismantling process for a fixed pulley sliding platform under a deck, which is shown in figures 1-7, wherein during partition dismantling, an upright column 13 at the front end of the sliding platform is preferentially dismantled, then vertical section steel at the foremost end area of the sliding platform 12 is dismantled, the vertical section steel is cut and dismantled from two sides to a deck hole 14 position one by one, and the upright column and the section steel in one area are dismantled each time, so that the upright column in the next area still can support the sliding platform 12.
The invention provides a process for dismantling a fixed pulley sliding platform under a deck, which is shown in figures 1-7, wherein the tail end of a steel wire rope 7 is connected with a counterweight hook 8. The steel wire rope 7 is connected with the counterweight lifting hook 8, so that the tail end of the steel wire rope 7 can automatically slide onto the sliding platform 12 conveniently, and can be connected with a dismantling component conveniently. In addition, a red marked cloth strip is tied on the steel wire rope 77 at a position one meter away from the cutting piece 9, when the cutting piece 9 is lifted to be close to the deck hole 14, the red marked cloth strip is preferentially appeared on the deck, a supervisor at the position of the hole opening notices that the person operating the winch 2 decelerates when seeing the mark through an interphone, and then the cutting piece 9 is slowly lifted to be lifted to a layer of main deck through the hole opening.
The invention provides a dismantling process for a fixed pulley sliding platform under a deck, which is characterized in that pipeline equipment around a deck hole 14 is wrapped with rubber as shown in figures 1-7. Damage to the pipeline by components during the hoisting process can be avoided.
The invention provides a process for dismantling a fixed pulley sliding platform under a deck, which is characterized in that a rail is fixed on the sliding platform 12, and a roller trolley 11 is arranged on the rail in a rolling manner, as shown in figures 1-7. The trolley 11 facilitates transport of the removed components beneath the deck hole 14 and lifting of the components onto the deck via the deck hole 14.
The invention provides a process for dismantling a fixed pulley sliding platform under a deck, which is shown in figures 1-7, wherein a first lifting point is a lifting lug plate 5, and a shackle 6 is connected between a chain block 10 and the lifting lug plate 5. The chain block 10 is respectively connected with the holes at the two ends of the cutting piece 9 through the shackles 6; the chain block 10 at the bottom of the operation connection is used for assisting tail feeding, meanwhile, a chain of the chain block 10 at the top of the operation connection is tightened, the cutting part 9 is adjusted to be in a horizontal state and placed on the roller trolley 11, and the roller trolley 11 is transported to the position of the fixed pulley sliding platform 12 below the opening of the deck at one layer through a rail.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (1)
1. The utility model provides a fixed pulley platform that slides under deck demolishs technology, the deck below is provided with the platform that slides the top on deck is provided with upper deck, its characterized in that: the method comprises the following steps:
a. a deck hole is formed in the deck corresponding to the middle of the sliding platform, a first lifting point is fixed on one side of the lower surface of the deck hole, a chain block is connected to the first lifting point, a second lifting point 15 is fixed on one side of the upper surface of the deck hole, and a guide pulley is connected to the second lifting point 15;
b. fixing a third lifting point on the upper deck corresponding to the deck hole, wherein the third lifting point is connected with a lifting pulley; a reinforcing beam is fixed on the upper deck, a reinforcing rib plate is welded between the reinforcing beam and the upper deck, the third lifting point is welded at the lower edge of the reinforcing beam, and the third lifting point is opposite to the deck hole;
c. arranging a winch on the deck, wherein a steel wire rope of the winch penetrates into the guide pulley from the ground, then penetrates into the lifting pulley, and is lowered to the sliding platform through the deck hole;
d. a track is fixed on the sliding platform, and a roller trolley is arranged on the track in a rolling manner; a temporary scaffold is erected below the sliding platform; dividing the sliding platform into six areas, dismantling the areas, placing the dismantled components on a roller trolley, and transferring the components to the lower part of the deck hole through a pre-installed track; the six subareas are a first subarea 17, a second subarea 18, a third subarea 19, a fourth subarea 20, a fifth subarea 21 and a sixth subarea 22 in sequence, deck holes are positioned above the position of the fifth subarea 21, when the subareas are dismantled, an upright post at the front end of the sliding platform is firstly dismantled, then vertical section steel at the foremost area of the sliding platform is dismantled, the vertical section steel is cut and dismantled from two sides to the position of the deck hole one by one, the upright post and the section steel in one area are dismantled each time, and the upright post in the next area still can support the sliding platform;
e. connecting two ends of the dismantled member with the tail ends of the chain block and the steel wire rope respectively, and then lifting the member to the deck;
wherein, pipeline equipment parcel rubber around the deck hole, first hoisting point is the lug plate, chain block with be connected with the shackle between the lug plate, wire rope's end-to-end connection has the counter weight lifting hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110700119.XA CN113335475B (en) | 2021-06-23 | 2021-06-23 | Deck bottom fixed pulley sliding platform dismantling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110700119.XA CN113335475B (en) | 2021-06-23 | 2021-06-23 | Deck bottom fixed pulley sliding platform dismantling process |
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| Publication Number | Publication Date |
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| CN113335475A CN113335475A (en) | 2021-09-03 |
| CN113335475B true CN113335475B (en) | 2022-07-05 |
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| CN202110700119.XA Active CN113335475B (en) | 2021-06-23 | 2021-06-23 | Deck bottom fixed pulley sliding platform dismantling process |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113859479B (en) * | 2021-11-02 | 2024-01-26 | 海洋石油工程（青岛）有限公司 | Method for quickly releasing DSU shipping fixing lacing wire |
| CN114734404B (en) * | 2022-04-12 | 2023-06-30 | 交通运输部上海打捞局 | Horizontal splitting method for end plate top beam and arc beam assembly of sunken ship integral salvaging equipment |
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| US4329935A (en) * | 1979-08-20 | 1982-05-18 | Von Tell Ab | Arrangement in mounting supplementary decks in ships |
| CN107487423A (en) * | 2017-08-21 | 2017-12-19 | 陶云兴 | A kind of boat scaffold peculiar to vessel and its method of construction |
| CN111409806A (en) * | 2020-03-13 | 2020-07-14 | 上海外高桥造船有限公司 | Generator moving-out method |
| CN112026987A (en) * | 2020-08-18 | 2020-12-04 | 广州文冲船厂有限责任公司 | Detachable grid assembly supporting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150114189A1 (en) * | 2012-09-17 | 2015-04-30 | Jon Khachaturian | Method and apparatus for removing underwater platforms |
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2021
- 2021-06-23 CN CN202110700119.XA patent/CN113335475B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329935A (en) * | 1979-08-20 | 1982-05-18 | Von Tell Ab | Arrangement in mounting supplementary decks in ships |
| CN107487423A (en) * | 2017-08-21 | 2017-12-19 | 陶云兴 | A kind of boat scaffold peculiar to vessel and its method of construction |
| CN111409806A (en) * | 2020-03-13 | 2020-07-14 | 上海外高桥造船有限公司 | Generator moving-out method |
| CN112026987A (en) * | 2020-08-18 | 2020-12-04 | 广州文冲船厂有限责任公司 | Detachable grid assembly supporting device |
Non-Patent Citations (1)
| Title |
|---|
| FPSO上部模块总体设计探讨;王战勇;《第十五届中国海洋（岸）工程学术讨论会论文集（上）》;20110803;第137-142页 * |
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