CN101475046B - Large-sized thruster underwater installing process based on L type floating platform - Google Patents
Large-sized thruster underwater installing process based on L type floating platform Download PDFInfo
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- CN101475046B CN101475046B CN2009100289896A CN200910028989A CN101475046B CN 101475046 B CN101475046 B CN 101475046B CN 2009100289896 A CN2009100289896 A CN 2009100289896A CN 200910028989 A CN200910028989 A CN 200910028989A CN 101475046 B CN101475046 B CN 101475046B
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Abstract
The invention discloses a process for installing a large propeller underwater based on an L-shaped floating platform. The process comprises the following steps: building the L-shaped floating platform; detaching a seal cap of an installing port of the propeller on the bottom of a ship; hoisting and launching the propeller into water; and displacing, positioning and installing the propeller. The process overcomes defects and difficulties in the prior art, uses the L-shaped floating platform as a displacing, positioning and position adjusting platform for the propeller, and has strong operability and adaptability.
Description
Technical field:
The invention belongs to deep-sea engineer equipment and large ship and repair and the building technology field, is a kind of angle of rake mounting process.
Background technology:
Minimizing gradually with the landing field oil gas energy, and human oil and gas development to the ocean constantly develops to deep water sea area and off-lying sea, need to build super deep sea drilling oil storage platform (FDSO) and other exploration equipments that can adapt to many marine environment, for each top activity such as hydrocarbon gas exploitation, exploration can be carried out smoothly, must solve the requirement of region, deep-sea positioning operation.Traditional multiple spot anchoring system can't satisfy, and the location that dynamic positioning system (DPS) can keep marine floating installation automatically without anchor system, promptly keep marine floating installation a certain position and bow to, thereby the stable operating environment of ocean operation is provided.Dynamic positioning system (DPS) is made up of parts such as accommodation display instrument, computer control system and propelling units, computing machine sends control signal according to the online accommodation numerical value of surveying of accommodation instrument, control angle of rake action, change the spiral shell square of angle of rake rotation direction, rotating speed or blade, reach the purpose of regulating and keeping the accommodation.Adopt the marine floating installation of dynamic positioning, the operation of casting anchor when having reduced marine operation, not being subjected to anchor is the restriction of length, the location cost and the depth of water are irrelevant, and is easy to operate.
Service marine site complexity, the degree of depth and the working ability of ocean floating installation are increasing at present, dynamic positioning system (DPS) is also had higher requirement, main working parts propelling unit in the corresponding dynamic positioning system (DPS) also becomes increasingly complex and is huge, angle of rake setting accuracy and technology directly have influence on the running of dynamic positioning system (DPS) and the accuracy of positioning of ocean floating installation, are that maritime works manufacturing enterprise is building the difficult problem that must solve when the maritime works equips.General propelling unit is installed to be divided under water with on the dock and is installed two kinds, can directly on dock, install for small propeller, install under water for general selection of medium-sized propelling unit, utilize loop wheel machine and diver's cooperation to finish angle of rake installation together, and often utilize barge and loop wheel machine to realize installing for large-scale propelling unit, traditional main shortcoming of large-scale propelling unit mounting process is the control of the propelling unit position and the degree of depth and adjusts relatively difficulty, need be by means of barge and specific anchor fitting, setting accuracy is low, working strength is big, efficient is very low, and production cycle is long.Patented technology report about the propelling unit installation existing few in number both at home and abroad by retrieval, the Vessel propulsion and/orsteering means (marine propeller/method of operating) of U.S. Anders Marius Liaanen application, approval number is US4046096, its installation method is to utilize two sleeve pipes, one is the vertical pipes that is fixed on the hull bottom installing port, another is to be used for axially movable temporary casing, rotatable hollow circuit cylinder is installed on the temporary casing, propelling unit is installed on the hollow circuit cylinder, by controlling being used of cylinder and temporary casing, propelling unit is installed, last removal hollow circuit cylinder and temporary casing, this invention is only applicable to small-sized and the installation intermediate ship ship propeller.U.S. Pat 4036163 described Apparatus formounting and dismounting submerged propeller unit for a floatingbody (installing under water and the angle of rake device of removal floating installation), its principle is to utilize the removable sealed chamber that is arranged in the cabin, staff and diver communicate contact and dismounting work in the sealed chamber, the location is the mode that adopts propelling unit mounting flange screw and hull bottom installing port screw to aim at, this invention location is inaccurate, randomness is too big, also is not suitable for large-scale angle of rake displacement and installation.The patent that relates to the installation of dynamic positioning system (DPS) and propelling unit in the Chinese patent is few especially, CN1191830A has reported the position of a kind of dynamically positioned loading buoy control oil tanker, and loading buoy has a plurality of thrusters and is used for relative offshore installation and loading buoy and oil tanker is positioned the position of a safety.Most of propelling unit patent all relates to the new design of ship propeller, and for example CN201176258 has reported a kind of heavily loaded L type worm gear swinging liftable all-direction propeller.The installation method about ocean engineering equipment and marine propeller of report all belongs to middle-size and small-size angle of rake installation both at home and abroad at present, and locatees inaccurate.If large-scale in addition FDSO dynamic positioning system (DPS) propelling unit is not by means of flotation gear, propelling unit is installed under water and is difficult to accurately location and safety installation.
Summary of the invention:
The objective of the invention is to overcome the defective and the difficulty of present prior art, provide a kind of L of utilization type raft to adjust platform, operability and adaptable large-sized thruster underwater installing process based on L type raft as angle of rake displacement, location and position.
The technical solution that the present invention adopts is:
A kind of large-sized thruster underwater installing process based on L type raft is characterized in that: comprise the building of L type raft, hull bottom propelling unit installing port capping dismounting, propelling unit lifting water and propelling unit displacement, location and installation steps down successively; Building by fixed L type support on barge or specific raft of described L type raft is used for propelling unit identification of position, arrangement, displacement and location; The step that hangs that comprises the installation of upper cover temporarily and installing port capping dismounting and installing port capping is successively removed in described hull bottom propelling unit installing port capping in the cabin in; Described propelling unit lifting water is down realized by the crane that is located on the ocean engineering equipment platform; Erection work is finished by the diver in the displacement of described propelling unit, location and install by the moving and adjust and realize of L type raft after propelling unit and location, hull bottom installation site match.
L type raft comprises barge or specific raft, fixed connecting part, L type support, propelling unit arrangement flat board and regulating mechanism five parts; Barge or specific raft are the fixed platforms of L type support, by fixed connecting part L type support is fixed on the raft, regulating mechanism is connected with the bottom of bolt and L type support, regulating mechanism utilizes motor can realize the translation of X, Y, Z direction and the rotation of Z direction, propelling unit settle dull and stereotyped be installed in regulating mechanism 5 directly over, adopt bolted connection, settle the dull and stereotyped translation and the rotation that under the effect of regulating mechanism, can realize the Z direction; Settle the draft H of angle of rake L type support
1Greater than drilling platform draft H
2, H
1=H
2+ H
Propelling unit+ 2500mm, the width W of L type support is greater than distance D between the maximum outer rim of propelling unit mounting center and drilling platform on the drilling platform, W=D+2500mm.
Building of L type support at first is to utilize main round bar and thin secondary round bar to be built into L type truss, and as the body of L type support, each rod member is by being made of welded connection.
Described hull bottom propelling unit installing port capping is removed and is realized by following steps, under the dry type environment, enter hull bottom propelling unit installing port in by cabin, finish the installation of interim upper cover, three lifting hole(eyelet) cappings of underwater demolition, remove the following capping of protection propelling unit screw propeller installation position, link up with for three side hooks of capping down under water by lifting hole(eyelet) earlier, lift three suspension hooks after having hung; Half of the whole bolt of rear end plates of capping under removing in the cabin sealed screw, in case intake in the cabin in; Slowly loosen three hoist cables in the cabin, make that capping breaks away from hull bottom down, the diver extracts three hoist cables under water, and the loop wheel machine on the deck platform will descend capping to sling simultaneously, emits the angle of rake hoist cable of lifting in three guide rods in the cabin, under hull bottom.
Described propelling unit lifting water down comprises the following order that hangs, hang over the suspension hook on the deck crane on the main suspension ring of propelling unit screw propeller sidepiece, utilize crane slowly propelling unit to be put into water, be placed on the arrangement flat board of L type raft, diver's entry will be hung in from three hoist cables that guide rod comes out on three branch suspension hooks of propelling unit screw propeller, after slow main hoist cable with deck crane loosens fully, shed main hoist cable on the main suspension ring by the diver, deck crane is regained main hoist cable.
The propelling unit displacement, location and installation realize by following steps: mobile L type raft arrives below the rig floor portion, utilize telecontrol engineering, settle dull and stereotyped by the regulating mechanism adjustment, make propelling unit to assigned address, open three branch hoist cable loop wheel machines in the cabin, three hoist cables are mentioned, treat that the propelling unit upper interface enters under the former hull bottom propelling unit installing port behind the capping present position fully, water carries out angle of rake installing and fixing under the diver, the diver opens the valve between interim upper cover and the following capping after installing in water, and by the inflation of the vent in the tie bolt, to get rid of the water in the sealed chamber, and whether there is water to reveal in the inspection chamber, open interim upper cover at last, so far propelling unit erection work is finished, and settles propelling unit by conveyer again on L type raft, enters next angle of rake installation exercise.
Propelling unit displacement is that the integral body by L type raft moves and realizes that propelling unit is relative static with L type raft in moving process.
Propelling unit should satisfy following launching condition when installing: wind speed≤6 grade, flow velocity≤2.0m/s has adopted wave height≤0.5m, the draft H of the operating area depth of water 〉=L type support
1, half dives refutes the dive zone does not have outstanding foreign matter.
The present invention has following technical advantage:
1. adopt L type raft, applicability is wide, under buoyancy function, installs laborsavingly, and the propelling unit of any tonnage and miscellaneous part can be realized mounting process under water with this method; The setting accuracy height when propelling unit displacement and location, can be adjusted angle of rake position by remote control; Operating procedure is simple, and the workmen need not special training and can operate; Duration shortening and cost are low, install because L type raft can be realized many orders, have reduced middle wait and setup time.
2. in the loop wheel machine angle of rake sealing that utilizes lifting force to realize propelling unit and hull bottom simultaneously of slinging, seal convenient and swift.
3. hull bottom propelling unit installing port capping dismantle processes adopts pre-installation of upper cover and following capping to remove two steps, makes having levels property of operation, under the prerequisite that guarantees precision, realizes correct fast installation, and can protect screw propeller installation position and leak tightness.
4. the operation that propelling unit hangs down water and lifting propelling unit and drilling platform bottom fixed position secured in alignment in the propelling unit installation process is different loop wheel machine and an operation of employing, it is the main loop wheel machine that adopts on the platform deck that propelling unit hangs down water, and the propelling unit fixed alignment is to be realized with three hoist cables by the loop wheel machine in the cabin, operation is well arranged, uniform force application, easy for installation.Wherein three hoist cables of loop wheel machine are to draw from guide rod and propelling unit lifting position is used together and has guaranteed assembly precision in the cabin.
Description of drawings:
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the constructional drawing of L type raft.
Fig. 2 is the front view of hull bottom propelling unit installing port figure.
Fig. 3 is Fig. 2 A-A view.
Fig. 4, Fig. 5, Fig. 6, Fig. 7 are based on the large-scale propelling unit of L type raft the key step scheme drawing are installed under water.
Fig. 8 is the position view of lifting hole(eyelet) capping in the capping down.
Fig. 9 is a side hook scheme drawing when lifting by crane capping down.
Figure 10 is the propelling unit scheme drawing.
： ( 1 ) ( 2 ) ( 3 ) L ( 4 ) ( 5 ) ( 6 ) ( 7 ) ( 8 ) ( 9 ) ( 10 ) ( 11 ) ( 12 ) ( 13 ) ( 14 ) ( 15 ) ( 16 ) ( 17 ) ( 18 ) SEVAN650 ( 19 ) ( 20 ) ( 21 ) L ( 22 ) ( 23 ) ( 24 ) ( 25 ) ( 26 ) ( 27 ) ( 28 ) ( 29 ) ( 30 ) L
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention further is described in detail.Present embodiment is installed with the propelling unit of SEVAN 650 cylindrical shape marine drilling oil storage platforms and is illustrated, whole technology comprises building of L type raft, the capping of hull bottom propelling unit installing port is removed, the propelling unit lifting is water down, the propelling unit displacement, location and installation, L type raft build the test that comprises launching condition, building of L type support, propelling unit is settled being connected and fixed of dull and stereotyped and regulating mechanism, being connected and fixed of raft and L type support, the placement of propelling unit on L type raft deck, hull bottom propelling unit installing port capping dismantle processes comprises the installation of interim upper cover in the cabin, hanging of installing port capping dismounting and installing port capping, propelling unit lifting water down comprises propelling unit in the placement of settling on the flat board, propelling unit preparatory work before installation, propelling unit displacement, location and installation comprise the displacement of L type raft, the location of propelling unit and hull bottom installing port relative position, angle of rake installation.
Main several steps specifically describes as follows:
1. the test of launching condition
Utilize various instruments to obtain each parameter, comprise wind speed, flow rate of water flow has adopted wave height, the operating area depth of water, drilling platform (SEVAN650) draft H
2, the draft H of L type raft
1If discontented foot row condition then select time else: wind speed≤6 grade (Pu Shi weathercock), flow velocity≤2.0m/s has adopted wave height≤0.5m, the draft H of the operating area depth of water 〉=L type support
1, the operating area does not have outstanding foreign matter.
2.L building of type support
As shown in Figure 1, L type raft comprises barge or specific raft 1, fixed connecting part 2, L type support 3, propelling unit arrangement dull and stereotyped 4 and regulating mechanism 5 five parts, barge or specific raft 1 are the fixed platforms of L type support 3, by fixed connecting part 2 L type support 3 is fixed on the raft 1, propelling unit settles dull and stereotyped 4 to be used for adjusting and placing propelling unit 17, and regulating mechanism 5 settles dull and stereotyped 4 to reach the purpose of adjusting the propelling unit position by adjusting.Wherein the build process of L type support 3 is as follows, utilize main round bar 24 and thin secondary round bar 22 to be built into L type truss, body as L type support, each rod member is by being made of welded connection, in build process, should be noted that distance and angle between load master round bar 24 and the secondary round bar 22, with intensity and final position, wherein the draft H of L type support of forming that guarantees L type support 3
1=H
2+ H
Propelling unit+ 2500mm (H
Propelling unitBe angle of rake height), the width W=D+2500mm of L type support (D be on the drilling platform 18 between the maximum outer rim of propelling unit mounting center and drilling platform distance).
3. propelling unit is settled being connected and fixed of dull and stereotyped and regulating mechanism
The center at 30 places, position of L type support 3, regulating mechanism 5 is positioned over the center of position 30, utilize bolt to be connected with L type support 3, regulating mechanism 5 utilizes motor can realize the translation of X, Y, Z direction and the rotation of Z direction, propelling unit settle dull and stereotyped 4 be installed in regulating mechanism 5 directly over, adopt bolted connection, settle flat board 4 under the effect of regulating mechanism 5, can realize the translation and the rotation of Z direction.
4. raft and L type support is connected and fixed
L type support 3 need be fixed on the raft 1, earlier steel plate 25, steel plate 26 and steel plate 27 are welded into cross section U type framework, many support tubes 28 are arranged to strengthen U type frame intensity in U type framework interior welds, 4 main round bar 24 weld togethers by 2 I-beam sections 29 and L type support, again 2 I-beam sections are welded on the steel plate 25, steel plate 27 are fastened on the drift platform 1 by bolt.
5. the placement of propelling unit on L type raft deck
On L type raft deck plane 21, moving track is installed, two flat boards and inhibiting device are installed on the track, flat board can slide along the track, spacing is 6000mm between two flat boards, propelling unit 17 is positioned on the flat board by loop wheel machine 14, after first propelling unit installs, and first flat board of removal, second flat board slides into inhibiting device, enters next angle of rake erection schedule.
6. the installation of interim upper cover in the cabin
Before propelling unit 17 is installed, for keeping the leak tightness in the cabin, at first need in the cabin, interim capping be installed at hull bottom propelling unit installing port place, it is interim upper cover 6, installation personnel enters hull bottom propelling unit installing port position in by cabin under the dry type environment, utilize bolt that interim upper cover 6 is fixed on hull bottom propelling unit installing port position, close the valve 7 in the sealed chamber 23 between interim upper cover and the following capping, three lifting hole(eyelet) cappings 8 of underwater demolition.
7. the installing port capping is removed
Following capping 10 is to be used for protecting propelling unit screw propeller installation position, before being installed, propelling unit needs to remove, dismounting order as Fig. 4～shown in Figure 6, link up with for three side hooks 11 of capping 10 down under water by lifting hole(eyelet) 9 earlier, utilize loop wheel machine 14 to lift three suspension hooks after having hung; Half of capping 10 whole bolt of rear end plates under removing in the cabin sealed screw with capping, in case intake in the cabin.
8. the installing port capping hangs
Utilize loop wheel machine in the cabin slowly to loosen three hoist cables 12 in the cabin, make that capping 10 breaks away from hull bottom 20 down, the diver extracts three hoist cables 12 under water, loop wheel machine 14 on the deck platform will descend capping 10 to sling simultaneously, emit the angle of rake hoist cable 12 of lifting in three guide rods 13 in the cabin, under hull bottom, for next step lifting propelling unit is prepared.
9. propelling unit is in the placement of settling on the flat board
L type raft is moved within the scope of work of deck crane 14, hang over the suspension hook on the deck crane 14 15 on the main suspension ring 16 of propelling unit screw propeller sidepiece, hang L type raft 1, the staff measures the distance in main pipe 24 outsides and hoist cable 19 on the L type raft 1, judge hoist cable 19 and the deviation of settling dull and stereotyped 4 centers, deviation is no more than 600mm, utilizes crane 14 slowly propelling unit 17 to be put into water, and sinking is on the arrangement flat board 4 of L type raft.
10. propelling unit preparatory work before installation
Diver's entry, because three hoist cables 12 have been put down in hanging of installing port capping in the step, now three hoist cables 12 that come out from cabin inner guide 13 are hung on three branch suspension hooks 18 of propelling unit 17, after slow hoist cable 19 with deck crane loosens fully, shed hoist cable 19 on the main suspension ring 16 by the diver, deck crane 14 is regained main hoist cable 19.
11.L the displacement of type raft
Before propelling unit is installed to hull bottom, propelling unit must be moved to below drilling platform 18 bottoms 20, promptly move to the hull bottom installing port under the position, do not surpass 400mm at vertical direction propelling unit line of centers and installing port position of center line deviation, the whole mobile L type raft that moves through of propelling unit 17 is realized.
12. the location of propelling unit and hull bottom installing port relative position
Utilize telecontrol engineering, adjust arrangement dull and stereotyped 4 by regulating mechanism 5, make propelling unit 17 position under the hull bottom installing port, do not surpass 40mm at vertical direction propelling unit line of centers and installing port position of center line deviation, open three branch hoist cable loop wheel machines in the cabin, slowly three hoist cables 12 are mentioned, treat that the propelling unit upper interface enters under the former hull bottom propelling unit installing port behind capping 10 present positions fully, finishes the location.
13. angle of rake installation
After loop wheel machine in the cabin is sling propelling unit, because the propelling unit front end has little tapering, therefore can utilize lifting force to realize the sealing of propelling unit and hull bottom, the diver utilizes bolt that propelling unit is fixed on hull bottom installing port position under water, the fastening of bolt can be implemented under the dry type environment, install back diver Open valve 7 in water, and by the inflation of the vent in the tie bolt, to get rid of the water in the sealed chamber 23, and whether there is water to reveal in the inspection chamber, open interim upper cover 6 at last, propelling unit erection work is so far finished.L type raft moves outward, and the arrangement flat board 4 on the L type support 3 shifts out hull bottom, settles propelling unit again by the conveyer on the L type raft on the flat board on the raft then, enters next angle of rake installation exercise.
Claims (3)
1. large-sized thruster underwater installing process based on L type raft is characterized in that: comprise the building of L type raft, hull bottom propelling unit installing port capping dismounting, propelling unit lifting water and propelling unit displacement, location and installation steps down successively; Building by fixed L type support on barge or specific raft of described L type raft is used for propelling unit identification of position, arrangement, displacement and location; The step that hangs that comprises the installation of upper cover temporarily and installing port capping dismounting and installing port capping is successively removed in described hull bottom propelling unit installing port capping in the cabin in; Described propelling unit lifting water is down realized by the crane that is located on the ocean engineering equipment platform; Erection work is finished by the diver in the displacement of described propelling unit, location and install by the moving and adjust and realize of L type raft after propelling unit and location, hull bottom installation site match.
2. the large-sized thruster underwater installing process based on L type raft according to claim 1 is characterized in that: L type raft comprises barge or specific raft, fixed connecting part, L type support, propelling unit arrangement flat board and regulating mechanism five parts; Barge or specific raft are the fixed platforms of L type support, by fixed connecting part L type support is fixed on the raft, regulating mechanism is connected with the bottom of bolt and L type support, regulating mechanism utilizes motor can realize X, Y, the rotation of the translation of Z direction and Z direction, propelling unit settle flat board be installed in regulating mechanism (5) directly over, adopt bolted connection, settle the dull and stereotyped translation and the rotation that can realize the Z direction under the effect of regulating mechanism: the draft H1 that settles angle of rake L type support is greater than drilling platform draft H2, H1=H2+H propelling unit+2500mm, the width W of L type support is greater than distance D between the maximum outer rim of propelling unit mounting center and drilling platform on the drilling platform, W=D+2500mm.
3. the large-sized thruster underwater installing process based on L type raft according to claim 2, it is characterized in that: building of L type support at first is to utilize main round bar and thin secondary round bar to be built into L type truss, as the body of L type support, each rod member is by being made of welded connection.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872022A (en) * | 2010-05-31 | 2010-10-27 | 南通中远船务工程有限公司 | Dynamic real-time positioning method for cylindrical marine work platform |
| CN102464088B (en) * | 2010-11-12 | 2014-02-19 | 烟台中集来福士海洋工程有限公司 | Method for installing thruster at bottom of drilling platform |
| CN103569311B (en) * | 2012-07-19 | 2015-12-30 | 烟台中集来福士海洋工程有限公司 | Propelling unit mounting and positioning device and propelling unit installation method under water |
| CN103661801B (en) * | 2013-11-29 | 2016-03-09 | 大连船舶重工集团有限公司 | The installation ancillary system of ocean engineering underwater propeller and installation method |
| CN104806763A (en) * | 2014-01-27 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Base device, sealing cover thereof and mobile offshore platform |
| CN105644713B (en) * | 2015-12-04 | 2018-12-18 | 大连中远船务工程有限公司 | Propeller mounting process method |
| CN107399409A (en) * | 2016-05-20 | 2017-11-28 | 中集海洋工程研究院有限公司 | The installation method of ocean platform propeller |
| CN106428417B (en) * | 2016-09-30 | 2018-01-09 | 南通中远船务工程有限公司 | Propeller installation method |
| CN108505974B (en) * | 2018-05-30 | 2024-04-12 | 大连船舶重工集团海洋工程有限公司 | Submarine support tool for semi-submersible platform propeller |
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