CN107758586B - Offshore Installation Method of Offshore Platform Thruster - Google Patents
Offshore Installation Method of Offshore Platform Thruster Download PDFInfo
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- CN107758586B CN107758586B CN201610681439.4A CN201610681439A CN107758586B CN 107758586 B CN107758586 B CN 107758586B CN 201610681439 A CN201610681439 A CN 201610681439A CN 107758586 B CN107758586 B CN 107758586B
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- 238000009434 installation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000013535 sea water Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000000712 assembly Effects 0.000 claims description 21
- 238000000429 assembly Methods 0.000 claims description 21
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract 1
- 238000005188 flotation Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Jib Cranes (AREA)
Abstract
本发明提供了一种海洋平台推进器的海上安装方法，以将推进器安装在浮筒的底部，该方法包括步骤：将推进器浸没于浮筒外侧的海水中，使推进器分别与平台自身的甲板吊以及贯穿浮筒的提升绳组件相连；其中，提升绳组件的尾端从浮筒底部穿出后连接所述推进器；利用甲板吊下放推进器，使其位于浮筒底板以下的水深位置；利用提升绳组件拉拽推进器，将推进器位置调整至浮筒正下方；通过提升绳组件提升推进器至浮筒底部并固定安装。本发明海洋平台推进器的海上安装方法，利用平台自身的甲板吊在离岸时自行完成推进器的安装，大大缩短了维修保养周期，减少了平台的运营成本。
The invention provides an offshore installation method of a propeller of an ocean platform to install the propeller on the bottom of a buoy. The method includes the steps of: immersing the propeller in the seawater outside the buoy, so that the propeller is respectively connected to the deck of the platform itself. The hoist is connected to the hoisting rope assembly that runs through the buoy; wherein, the tail end of the hoisting rope assembly is connected to the propeller after passing through the bottom of the buoy; the propeller is lowered by means of a deck hoist, so that it is located in the water depth position below the bottom plate of the buoy; using the hoisting rope The component pulls the propeller and adjusts the position of the propeller to just below the buoy; lift the propeller to the bottom of the buoy through the lifting rope assembly and install it fixedly. The offshore installation method of the marine platform propeller of the present invention utilizes the platform itself to complete the installation of the propeller when the platform itself is hung offshore, greatly shortening the maintenance period and reducing the operating cost of the platform.
Description
Technical Field
The invention relates to the field of ocean engineering, in particular to an offshore installation method of a large-scale propeller of a ship or an ocean platform.
Background
In the offshore navigation or operation process of the ocean platform, if a full-circle propeller breaks down and needs to be repaired or replaced by a new propeller, the platform is traditionally dragged to a land wharf or a dock by a tugboat for related repair or replacement, but in the method, the tugboat is leased for dragging, and the platform needs to stop working and docking, so that high operation cost is generated, the repair and replacement period is long, and the cost of a platform operator is greatly increased. Another conventional operation method is to rent a floating crane, a barge and a tug to cooperate with each other to complete the replacement and installation of the propeller at sea, and also this method results in high operation cost due to the rent of a large amount of equipment and personnel, and has long operation period and poor maneuverability due to the influence of equipment cooperation and sea conditions.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides an offshore installation method for a propeller of an offshore platform, so as to solve the problems of complex operation, high cost, long period, etc. caused by the fact that the platform must be pulled back to a land dock or the propeller must be repaired or replaced in the dock in the prior art.
In order to solve the technical problem, the invention provides an offshore installation method of a marine platform propeller, which is used for installing the propeller at the bottom of a buoy and comprises the following steps: immersing the propeller in the seawater outside the buoy, and respectively connecting the propeller with a deck crane of the platform and a lifting rope assembly penetrating through the buoy; the tail end of the lifting rope assembly penetrates out of the bottom of the buoy and then is connected with the propeller; a thruster is lowered by using a deck crane and is positioned at a water depth position below the bottom plate of the buoy; pulling the propeller by using the lifting rope assembly, and adjusting the position of the propeller to be right below the buoy; the propeller is lifted to the bottom of the buoy through the lifting rope assembly and is fixedly installed.
In a preferred embodiment, the submerging the propeller in the seawater outside the pontoon comprises: and placing the propeller at the position of the open deck, wherein the position is within the working radius range of the deck crane of the platform per se corresponding to the load, and lowering the propeller into the seawater immersed outside the buoy by using the deck crane.
In a preferred embodiment, the step of connecting the pusher to the hoisting rope assembly comprises: and the tail end of the lifting rope assembly penetrates out of the bottom of the buoy and then upwards winds to the outer side of the top of the buoy, and the tail end of the lifting rope assembly is connected with the propeller.
In a preferred scheme, in the step of penetrating the tail end of the lifting rope assembly out of the bottom of the buoy and then winding the tail end of the lifting rope assembly upwards to the outer side of the top of the buoy, a group of hauling ropes are provided, the lower ends of the hauling ropes are placed along the outer side of the buoy and then connected with the tail end of the lifting rope assembly, and the hauling ropes are drawn and wound to wind the tail end of the lifting rope assembly to the outer side of the top of the buoy; before the step of placing the propeller by using the deck crane, the hauling rope is released, so that the tail end of the lifting rope assembly is placed along with the propeller together, and the connection between the hauling rope and the lifting rope assembly is released after the hauling rope is not pulled.
In a preferred embodiment, before the step of pulling the pusher with the lift cord assembly, the step of: the deck crane is rotated to horizontally move the propeller towards the direction of the buoy until a lifting rope of the deck crane is attached to the outer wall of the buoy.
In a preferred embodiment, the lift line assembly extends through the propeller chamber of the buoy; the number of the lifting rope assemblies is three, and the three lifting rope assemblies are distributed in the vertical direction in the cabin of the propeller.
In a preferred scheme, in the step of adjusting the position of the thruster to be right below the buoy, one lifting rope assembly on the outboard side is locked, and the thruster is dragged to the inboard installation position through the two lifting rope assemblies on the inboard side, so that the thruster is in a vertical state.
In a preferred embodiment, after the step of adjusting the propeller position to be right below the buoy, the method further includes: the connection between the thruster and the deck crane is released.
In a preferred aspect, the hoisting rope assembly comprises: the lifting rope, the locking section and the bow shackle are arranged at the tail end of the lifting rope; the lifting rope is arranged in a lifting pipe of a propeller cabin of the buoy in a penetrating way; the hoist rope assembly is connected to the propeller using the bow shackle.
In a preferred embodiment, the method further comprises the following steps: a lifting jack is fixedly mounted on the top of the buoy, and the lifting jack is utilized to release or lock the lifting rope assembly.
In a preferred embodiment, a soft strap is provided on the pusher, so that the pusher is connected to the tail end of the lift cord assembly by means of said soft strap.
Compared with the prior art, the invention has the following beneficial effects: the marine installation method of the marine platform propeller disclosed by the invention automatically completes the installation of the propeller when the deck of the platform is hung offshore, overcomes the problem that the propeller needs to be replaced and installed when the platform is in shore or in a dock in the prior art, greatly shortens the maintenance period and reduces the operation cost of the platform.
Drawings
Fig. 1 is a flow chart illustrating the steps of the offshore installation method of the offshore platform propeller according to the embodiment.
Fig. 2 is a schematic diagram of the present embodiment in a state in which the hoist rope assembly and the traction ropes are arranged.
Fig. 3 is a partially enlarged view of a in fig. 2.
Fig. 4 is a schematic view of the present embodiment with the lift line assembly lifted to the outboard side of the buoy.
Fig. 5 is a schematic view of the propeller of the present embodiment submerged in seawater outside the pontoon.
Fig. 6 is a schematic view of the pusher of this embodiment just connected to the hoist rope assembly.
Fig. 7 is a schematic view of the present embodiment of a thruster lowering a hoist line assembly with a pull line.
Fig. 8 is a schematic view of the propeller of the present embodiment being lowered to a position below the bottom plate of the pontoon.
Fig. 9 is a schematic view of the present embodiment after the rotating deck crane.
Fig. 10 is a schematic view illustrating a first state in which the thruster of the present embodiment is adjusted to be directly below the buoy.
Fig. 11 is a schematic view illustrating a second state in which the thruster of the present embodiment is adjusted to be directly below the buoy.
Fig. 12 is a schematic view illustrating a third state in which the thruster of the present embodiment is adjusted to be directly below the buoy.
Fig. 13 is a schematic view illustrating a fourth state in which the thruster of the present embodiment is adjusted to be directly below the buoy.
Fig. 14 is a schematic view of the state that the propeller is lifted to the bottom of the pontoon according to the embodiment.
Fig. 15 is a schematic view showing another state of the embodiment of lifting the propeller to the bottom of the pontoon.
The reference numerals are explained below: 11. a platform column; 2. a propeller; 3. a float bowl; 31. a propeller chamber; 32. a riser tube; 41. a lifting rope; 5. a lift cord assembly; 51. a lift cord; 52. locking the sections; 53. bow shackle; 6. a hauling rope; 7. lifting the jack; 8. a soft belt.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 15, the offshore installation method of the offshore platform propeller of the present embodiment is to install the propeller 2 at the bottom of the pontoon 3, specifically, at the propeller chamber 31 of the pontoon 3. The method comprises the following steps:
step S100, the propeller 2 is immersed in seawater outside the buoy 3, so that the propeller 2 is respectively connected with a deck crane of the platform and a lifting rope assembly 5 penetrating through the buoy 3. Wherein, the tail end of the lifting rope component 5 is connected with the propeller 2 after penetrating out from the bottom of the buoy 3.
And S200, lowering the propeller 2 by using the deck crane to enable the propeller to be positioned at the water depth position below the bottom plate of the buoy 3.
Step S300, the propeller 2 is pulled by the lifting rope assembly 5, and the position of the propeller 2 is adjusted to be right below the buoy 3.
And S400, lifting the propeller 2 to the bottom of the buoy 3 through the lifting rope assembly 5 and fixedly installing.
The flotation pontoon 3 of this embodiment sets up in the bottom of platform stand 11, at three lifting jack 7 of the top fixed mounting of flotation pontoon 3, will mark three lifting rope subassembly 5 of different colours and be connected with three lifting jack 7 respectively. Wherein, as shown in fig. 3, the lift cord assembly 5 comprises: a lift cord 51, a locking knob 52 at the tail end of the lift cord 51, and a shackle 53, the shackle 53 being adapted to be connected to the thruster 2. The lift cords 51 are threaded into the risers 32 of the thruster well 31 of the buoy 3, with the lift jacks 7 being used to release or lock the lift cord assemblies 5. Preferably, the three lift line assemblies 5 are evenly distributed in the vertical direction of the thruster well 31 and their tail ends are passed out from the bottom of the pontoon 3. In this embodiment, three lift cord assemblies 5 are distributed at locations around the propeller shaft.
It should be noted that the number of lifting jacks 7 corresponds to the number of lift cord assemblies 5.
In practice, the distribution of the three lift cord assemblies 5 in the thruster well 31 may also be non-uniform and is not limited here.
Three soft belts 8 with different colors are preset at the hanging point position of the propeller 2, so that the propeller 2 is connected with the tail end of the lifting rope assembly 5 by using the soft belts 8 according to color classification, namely, connected with the bow shackle 53 at the tail end of the lifting rope assembly 5, so that the hanging point of the propeller 2 corresponds to the final installation position.
In actual use, the soft belt 8 at the suspension point position of the thruster 2 may be omitted.
It should be noted that: three hoisting points on the propeller 2 can reach the installation state of the propeller 2 in the process that the propeller 2 is lifted to the bottom of the buoy 3 from the position right below the buoy 3, namely the installation shaft of the propeller 2 faces upwards, and the paddle faces downwards, so that the propeller can be directly connected with the installation socket after being lifted to the place.
In other embodiments, the number of lifting rope assemblies 5, lifting jacks 7 and soft belts 8 may again be more than three.
In step S100, immersing the propeller 2 in the seawater outside the pontoon 3 includes: the thruster 2 is placed at the position of the open deck, the position is positioned in the working radius range of the deck crane of the platform per se corresponding to the load, and the thruster 2 is lowered to the seawater immersed outside the buoy 3 by the deck crane.
In actual operation, if the lifting load of the deck lifting hook of the platform is smaller than the weight of the propeller 2 when the propeller 2 is arranged, the propeller 2 can be immersed into the sea in advance, the load of the deck lifting hook is reduced due to the buoyancy of seawater, the amplitude variation angle of the deck lifting arm is slowly reduced at the moment, the working radius of the deck lifting arm is gradually increased until the deck lifting hook reaches the position close to the arrangement position of the propeller 2, the propeller 2 is lifted to be close to the water surface at the moment, and then the deck lifting hook is connected with the lifting rope assembly 5.
Referring to fig. 2, 4, 5 and 6, the step of connecting the pusher 2 to the lift cord assembly 5 includes: the tail end of the lifting rope component 5 penetrates out of the bottom of the buoy 3 and then winds up to the outer side of the top of the buoy 3, and the tail end of the lifting rope component 5 is connected with the propeller 2. Further, a group of hauling ropes 6 is provided, the upper ends of which are fixed on the top of the buoy 3, and in this embodiment, the upper ends of which are fixedly connected with a lifting jack 7; the lower extreme of haulage rope 6 is followed 3 outsides of flotation pontoon and is transferred the back and is linked to each other with the tail end of lifting rope subassembly 5, receive and draw haulage rope 6 and release lifting rope subassembly 5 simultaneously and wind the tail end of lifting rope subassembly 5 to 3 tops outsides of flotation pontoon.
Referring to fig. 7 and 8, before step S200, the pull-cord 6 is released so that the tail end of the lift-cord assembly 5 is lowered with the pusher 2 until the pull-cord 6 is released from any tension and the connection of the pull-cord 6 to the lift-cord assembly 5 is released. Specifically, a worker standing on the top of the buoy 3 releases the hauling rope 6 to lower the hoist rope assembly 5 until the hauling rope 6 is free of any pulling force, and then the diver dives into the water to remove the hauling rope 6; then the thruster 2 is continuously lowered by the deck crane to reach the depth of the water below the bottom plate of the pontoon 3.
As shown in fig. 9, before the step S300 "pulling the pusher with the lift cord assembly" further includes: the deck crane is rotated to horizontally move the propeller 2 towards the buoy 3 until the lifting rope 41 of the deck crane is attached to the outer wall of the buoy 3, and then the deck crane is locked.
Referring to fig. 10 to 13, for the sake of clarity, the right side of the drawing sheet is outboard and the left side of the drawing sheet is inboard. In step S300, the three lift cord assemblies 5 are slowly retrieved using the lift jacks 7 until the lift cords 51 are fully tightened. Then, one of the outboard lift cord assemblies 5 is locked, and the thruster 2 is pulled toward the inboard installation position by the two inboard lift cord assemblies 5 to bring the thruster 2 into a vertical state. The vertical state is a state in which the propeller 2 is mounted with the mounting shaft facing upward. In the adjusting process, the tension of the lifting rope assembly 5 needs to be observed, and the tension of the lifting rope assembly 5 is ensured not to exceed the rated safe load of the lifting lug of the propeller 2; if the lifting load is close to the safe load of the lifting lugs of the thruster 2, it is necessary to stop the lifting jack 7 in time, while releasing the thruster 2 again downwards by means of the deck crane.
Further, after the step of adjusting the position of the thruster 2 to be right below the buoy 3, the method further comprises the following steps: the connection of the thruster 2 and the deck crane is released.
In step S400, the lengths of the lift cord assemblies 5 are adjusted by the lift jacks 7, as in fig. 14 and 15, ensuring that the lengths of the final three lift cord assemblies 5 are as long; preferably, the lengths of the three lift cord assemblies 5 are determined to be as long by markings marked on the lift cord assemblies 5. Then, the lifting jack 7 is utilized to start to lift the lifting rope assembly 5 vertically upwards, when the propeller 2 reaches the socket at the bottom of the buoy 3, a diver checks the centering condition of the shaft of the propeller 2 and the socket, if necessary, the position of the propeller 2 is adjusted through the lifting jack 7 until the propeller 2 is lifted to the installation position in the socket, and finally, the diver releases the connection of the lifting rope assembly 5 to complete the installation engineering of the propeller 2.
The offshore installation method of the offshore platform propeller disclosed by the invention automatically completes the installation of the propeller when the deck of the platform is hung offshore, overcomes the problem that the propeller needs to be replaced and installed when the platform is in shore or in a dock in the prior art, greatly shortens the maintenance period and reduces the operation cost of the platform.
While the present invention has been described with reference to the above exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (6)
1. A method of offshore installation of a propeller of an offshore platform to mount the propeller at the bottom of a pontoon, the method comprising the steps of:
immersing the propeller in the seawater outside the buoy, and respectively connecting the propeller with a deck crane of the platform and a lifting rope assembly penetrating through the buoy; wherein the lift line assembly extends through the propeller chamber of the buoy; the number of the lifting rope assemblies is three, and the three lifting rope assemblies are distributed in the vertical direction in the cabin of the propeller; the tail end of the lifting rope assembly penetrates out of the bottom of the buoy and then is connected with the propeller;
a thruster is lowered by using a deck crane and is positioned at a water depth position below the bottom plate of the buoy;
rotating the deck crane to horizontally move the propeller towards the direction of the buoy until a lifting rope of the deck crane is attached to the outer wall of the buoy;
keeping the connection between the propeller and the deck crane, pulling the propeller by using the lifting rope assembly, and adjusting the position of the propeller to be right below the buoy; wherein, a lifting jack is fixedly arranged at the top of the buoy, and the lifting jack is utilized to release or lock the lifting rope assembly; specifically, the three lifting rope assemblies are recovered by the lifting jack until the lifting rope assemblies are completely tightened, then one lifting rope assembly on the outboard side is locked, and the thruster is dragged to the inboard installation position by the two lifting rope assemblies on the inboard side, so that the thruster is in a vertical state;
the connection between the propeller and the deck crane is released, and the propeller is lifted to the bottom of the buoy through the lifting rope assembly and is fixedly installed.
2. A method of offshore installation of a marine platform propeller as claimed in claim 1, wherein said submerging the propeller in seawater outside of the buoy comprises:
and placing the propeller at the position of the open deck, wherein the position is within the working radius range of the deck crane of the platform per se corresponding to the load, and lowering the propeller into the seawater immersed outside the buoy by using the deck crane.
3. A method of offshore installation of a marine platform propeller as claimed in claim 1, wherein the step of connecting the propeller to the hoisting line assembly comprises: and the tail end of the lifting rope assembly penetrates out of the bottom of the buoy and then upwards winds to the outer side of the top of the buoy, and the tail end of the lifting rope assembly is connected with the propeller.
4. Method for offshore installation of a marine platform propeller according to claim 3,
in the step of penetrating the tail end of the lifting rope assembly out of the bottom of the buoy and then winding the tail end of the lifting rope assembly upwards to the outer side of the top of the buoy, a group of hauling ropes is provided, the lower ends of the hauling ropes are placed along the outer side of the buoy and then connected with the tail end of the lifting rope assembly, and the hauling ropes are drawn and wound to wind the tail end of the lifting rope assembly to the outer side of the top of the buoy;
before the step of placing the propeller by using the deck crane, the hauling rope is released, so that the tail end of the lifting rope assembly is placed along with the propeller together, and the connection between the hauling rope and the lifting rope assembly is released after the hauling rope is not pulled.
5. Method for offshore installation of a marine platform thruster according to claim 1, characterised in that the hoisting line assembly comprises: the lifting rope, the locking section and the bow shackle are arranged at the tail end of the lifting rope;
the lifting rope is arranged in a lifting pipe of a propeller cabin of the buoy in a penetrating way;
the hoist rope assembly is connected to the propeller using the bow shackle.
6. A method for offshore installation of a marine platform thruster according to claim 1, characterised in that a soft strip is provided on the thruster, by means of which the thruster is connected to the tail end of the hoisting line assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681439.4A CN107758586B (en) | 2016-08-17 | 2016-08-17 | Offshore Installation Method of Offshore Platform Thruster |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681439.4A CN107758586B (en) | 2016-08-17 | 2016-08-17 | Offshore Installation Method of Offshore Platform Thruster |
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| Publication Number | Publication Date |
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| CN107758586A CN107758586A (en) | 2018-03-06 |
| CN107758586B true CN107758586B (en) | 2021-03-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066035A (en) * | 1975-06-06 | 1978-01-03 | Aktiebolaget Karlstads Mekaniska Werkstad | Apparatus for mounting and dismounting a submerged propeller unit for a floating body |
| US4696650A (en) * | 1984-05-23 | 1987-09-29 | Kamewa Ab | Arrangement for fitting a propeller assembly to an opening in a bottom structure of a watercraft and for dismantling the assembly therefrom |
| CN2920818Y (en) * | 2006-03-21 | 2007-07-11 | 天津新港船厂 | Car type electric propelling device and berth mounting structure |
| CN102046464A (en) * | 2008-04-03 | 2011-05-04 | 罗尔斯-罗伊斯股份公司 | Method and arrangement for attachment and/or disassembly/assembly of a tunnel thruster |
| CN102464088A (en) * | 2010-11-12 | 2012-05-23 | 烟台中集来福士海洋工程有限公司 | Method for installing thruster at bottom of drilling platform |
| CN103661801A (en) * | 2013-11-29 | 2014-03-26 | 大连船舶重工集团有限公司 | Auxiliary installation system and installation method of ocean engineering underwater propeller |
-
2016
- 2016-08-17 CN CN201610681439.4A patent/CN107758586B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4066035A (en) * | 1975-06-06 | 1978-01-03 | Aktiebolaget Karlstads Mekaniska Werkstad | Apparatus for mounting and dismounting a submerged propeller unit for a floating body |
| US4696650A (en) * | 1984-05-23 | 1987-09-29 | Kamewa Ab | Arrangement for fitting a propeller assembly to an opening in a bottom structure of a watercraft and for dismantling the assembly therefrom |
| CN2920818Y (en) * | 2006-03-21 | 2007-07-11 | 天津新港船厂 | Car type electric propelling device and berth mounting structure |
| CN102046464A (en) * | 2008-04-03 | 2011-05-04 | 罗尔斯-罗伊斯股份公司 | Method and arrangement for attachment and/or disassembly/assembly of a tunnel thruster |
| CN102464088A (en) * | 2010-11-12 | 2012-05-23 | 烟台中集来福士海洋工程有限公司 | Method for installing thruster at bottom of drilling platform |
| CN103661801A (en) * | 2013-11-29 | 2014-03-26 | 大连船舶重工集团有限公司 | Auxiliary installation system and installation method of ocean engineering underwater propeller |
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| Publication number | Publication date |
|---|---|
| CN107758586A (en) | 2018-03-06 |
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