CN103569311B - Propelling unit mounting and positioning device and propelling unit installation method under water - Google Patents
Propelling unit mounting and positioning device and propelling unit installation method under water Download PDFInfo
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- CN103569311B CN103569311B CN201210251599.7A CN201210251599A CN103569311B CN 103569311 B CN103569311 B CN 103569311B CN 201210251599 A CN201210251599 A CN 201210251599A CN 103569311 B CN103569311 B CN 103569311B
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Abstract
The present invention relates to propelling unit mounting and positioning device and propelling unit installation method under water, mounting and positioning device comprises corresponding to propelling unit the first floating drum carrying angle of rake collet and be connected respectively with collet both sides and the second floating drum.First floating drum is provided with the first valve injecting water or got rid of by the water in the first floating drum in the first floating drum and the second valve injecting air or got rid of by the air in the first floating drum in the first floating drum, second floating drum is provided with the first valve injecting water or got rid of by the water in the second floating drum in the second floating drum and the second valve injecting air or got rid of by the air in the second floating drum in the second floating drum, second valve is connected with an Air compressor by pipeline, pipeline is provided with air transfer valve and air diverter valve.The present invention under water installation method utilizes propelling unit mounting and positioning device to carry propelling unit to appointed place under water, not only reduces installation difficulty, improves safety, shorten the platform construction cycle; And setting accuracy is high, cost of installation is low.
Description
Technical field
The present invention relates to marine engineering equipment construction applications, specifically, relate to the mounting and positioning device installed for propelling unit in floating installation dynamic positioning system (DPS) and installation method under water.
Background technology
In floating installation dynamic positioning system (DPS), angle of rake installation owing to being all a difficult problem by the restriction of natural conditions concerning each platform construction enterprise.Propelling unit is a large scale, heavy weight movable parts, and require higher for setting accuracy and will have good sealing with platform bulkhead, angle of rake setting accuracy directly affects positioning precision and the running of platform.Traditional large-scale propelling unit is installed and is mostly utilized crane barge, barge, deck is hung, during installation, first outside loop wheel machine lifts by crane propelling unit, then from the preset transtracheal catheter of platform buoyancy aid, (this conduit is preset at the beginning of platform buoyancy aid is built, locus is corresponding with angle of rake three hanger hole sites, this method generally adopts in platform construction) in pass three hoist cables and be connected with angle of rake three suspension centres respectively, then adopt the mode of relay and under the cooperation of diver, make propelling unit gradually immediately below mounting hole vertically.This kind of mounting means has following shortcoming: installation region needs to carry out at the deep-sea that the depth of water is darker, and installation operating mode is poor, and difficulty is comparatively large, poor stability, and setting accuracy is low, and production cycle is long, and loop wheel machine expense, charge for tug's service are used, labour cost is higher.
Summary of the invention
Technical matters to be solved by this invention is, for utilizing crane barge, barge, deck hangs and carry out installing the deficiency existed to propelling unit, provides a kind of and can carry the propelling unit mounting and positioning device of propelling unit to appointed place under water.
To achieve these goals, propelling unit mounting and positioning device of the present invention, comprises corresponding to propelling unit to carry angle of rake collet, and the first floating drum be connected respectively with described collet both sides and the second floating drum; Wherein, described first floating drum is provided with the first valve injecting water or got rid of by the water in the first floating drum in the first floating drum and the second valve injecting air or got rid of by the air in the first floating drum in the first floating drum, described second floating drum is also provided with the first valve injecting water or got rid of by the water in the second floating drum in the second floating drum and the second valve injecting air or got rid of by the air in the second floating drum in the second floating drum, described second valve is connected with an Air compressor by pipeline, described pipeline is provided with air transfer valve and air diverter valve.
Above-mentioned propelling unit mounting and positioning device, wherein, described first floating drum is connected with described collet respectively by each self-corresponding strut member with the second floating drum.
Above-mentioned propelling unit mounting and positioning device, wherein, described first floating drum, the second floating drum connect into U-shaped by described strut member and described collet.
Above-mentioned propelling unit mounting and positioning device, wherein, described first floating drum and the second floating drum all comprise two cabins, and each cabin is the second valve described in the first valve and described in corresponding all.
Above-mentioned propelling unit mounting and positioning device, wherein, described strut member is provided with fence.
Above-mentioned propelling unit mounting and positioning device, wherein, is provided with fixing stull and removable stull between described first floating drum and the second floating drum.
Above-mentioned propelling unit mounting and positioning device, wherein, described collet comprises the mounting frame be welded by I-beam section and the propelling unit adapter plate be arranged on mounting frame, and described propelling unit adapter plate is provided with anti-striker.
Further, the invention provides a kind of propelling unit installation method under water, for propelling unit being installed on buoyancy aid under platform, comprising:
Step S100, loads propelling unit on the collet of propelling unit mounting and positioning device described above;
Step S200, will be mounted with angle of rake described propelling unit mounting and positioning device and be transported to harbour and be incorporated to water;
Step S300, adjusts described propelling unit mounting and positioning device position to position described propelling unit;
Step S400, behind described propelling unit mounting and positioning device dive to desired location, draw its to buoyancy aid opposite position under described platform;
Step S500, promotes the position that described propelling unit extremely connects with buoyancy aid under described platform; And
Step S600, installs described propelling unit under described platform on buoyancy aid correspondence position;
Wherein, in described step S300, comprise again:
Step S310, is connected one first hawser of described first floating drum with a platform dive winch, is connected by the hawser of described second floating drum with a seashore loop wheel machine, and described first floating drum is reclined buoyancy aid under described platform; And
Step S320, by opening or closing described first valve, described second valve, described air transfer valve and described air diverter valve to adjust described first floating drum and the second floating drum.
Above-mentioned propelling unit installation method under water, wherein, in described step S400, also comprise the one second hawser Connection Step by described first floating drum and described platform dive winch, wherein, described first hawser winding is on one first reverse wheel, described first reverse wheel is arranged on first jiao of buoyancy aid under described platform, described second hawser winding is on one second reverse wheel, and described second reverse wheel is arranged on second jiao of buoyancy aid under described platform, described second jiao with described first jiao relative.
Above-mentioned propelling unit installation method under water, wherein, after described step S600, also has and reclaims described propelling unit mounting and positioning device step S700, in this step, comprising:
Step S701, removes removable stull, connects removable stull again after described propelling unit mounting and positioning device is shifted out propelling unit scope;
Step S702, closes described air diverter valve, opens described air transfer valve, described propelling unit mounting and positioning device is sunk down into and is separated with buoyancy aid under described platform;
Step S703, pulls the side of a ship exterior domain of described propelling unit mounting and positioning device away from buoyancy aid under platform;
Step S704, closes described air transfer valve, opens described air diverter valve, and described propelling unit mounting and positioning device is floated.
Above-mentioned propelling unit installation method under water, wherein, between described step S400 and described step S500, also comprises:
Step S510, is connected on described angle of rake corresponding hanger by hydraulic rockshaft hawser, simultaneously angle of rake socket bottom cover described in underwater demolition;
Step S520, carries out position adjustment again to locate described propelling unit to described propelling unit mounting and positioning device.
Beneficial functional of the present invention is: dock with buoyancy aid under platform to facilitate propelling unit to appointed place under water by propelling unit mounting and positioning device carrying propelling unit, utilize crane barge, barge relative to tradition, deck lifts up into for row propelling unit installs under water, not only reduce installation difficulty, improve safety, shorten the platform construction cycle; And setting accuracy is high, cost of installation is low.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is the front view of propelling unit mounting and positioning device of the present invention;
Fig. 2 is the birds-eye view of Fig. 1;
Fig. 3 is the lateral plan of Fig. 1;
Fig. 4 is the A-A cutaway view (having removed removable stull) in Fig. 2;
Fig. 5 is the pipeline control principle drawing of propelling unit mounting and positioning device of the present invention;
Fig. 6 to Fig. 8 is the installation process schematic diagram utilizing propelling unit mounting and positioning device of the present invention to carry out propelling unit to install under water.
Wherein, Reference numeral
100-propelling unit mounting and positioning device
110-collet
111-mounting frame
112-propelling unit adapter plate
113-anti-striker
120-the first floating drum
121-the first valve
122-the second valve
123-cabin BT2
124-cabin BT1
130-the second floating drum
131-the first valve
132-the second valve
133-cabin BT3
134-cabin BT4
140-fence
150-strut member
160-strut member
170-removable stull
180-fixing stull
200-Air compressor
301 ~ 304-pipeline
311 ~ 314-air transfer valve
321 ~ 324-air diverter valve
330-air-safety valve
400-propelling unit
Buoyancy aid under 500-platform
501-the first angle
502-the second angle
503-propelling unit socket
5031-socket bottom cover
5032-sensor pin
601-the first hawser
602-the second hawser
The hawser of 701-seashore loop wheel machine
801-the first reverse wheel
802-the second reverse wheel
900-hydraulic rockshaft
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical solution of the present invention is described in detail, further to understand object of the present invention, scheme and effect, but not as the restriction of claims protection domain of the present invention.
Propelling unit mounting and positioning device of the present invention is mainly used in carrying propelling unit to appointed place under water, to facilitate angle of rake installation.
Consult Fig. 1 to Fig. 4, as shown in the figure, propelling unit mounting and positioning device 100 comprises collet 110, first floating drum 120, second floating drum 130, strut member 150 and strut member 160.The shape of collet 110 and size need be corresponding to propelling unit to carry propelling unit, damaged propelling unit during to avoid contacting with propelling unit.First floating drum 120 is connected with collet 110 both sides respectively with the second floating drum 130, specifically, first floating drum 120 is connected to the side of collet 110 by the strut member 150 corresponding with it, second floating drum 130 is connected to the opposite side of collet 110 by the strut member 160 corresponding with it, like this, the first floating drum 120, second floating drum 130 connects into U-shaped by strut member 150,160 and collet 110.First floating drum 120 is provided with to inject in the first floating drum 120 water or by the first floating drum 120 the first valve 121 of getting rid of of water and in the first floating drum, inject air or the second valve 122, second floating drum 130 that the air in the first floating drum is got rid of also be provided with in the second floating drum, to inject water or the first valve 131 got rid of by the water in the second floating drum and the second valve 132 injecting air or got rid of by the air in the second floating drum in the second floating drum.
In conjunction with consulting Fig. 5, the second valve 122,132 is connected with an Air compressor 200 by each self-corresponding pipeline, pipeline is provided with air transfer valve and air diverter valve.Preferably, the first floating drum 120 and the second floating drum 130 all comprise two cabins, and as shown in Figure 2, the first floating drum 120 comprises cabin 123(BT2) and cabin 124(BT1), the second floating drum 120 comprises cabin 133(BT3) and cabin 134(BT4).It should be noted that, corresponding one first valve in each cabin and one second valve (this point is not shown in the drawings), specifically, corresponding one first valve 121 and one second valve 122 in cabin 123, corresponding one first valve 121 and one second valve 122 in cabin 124, corresponding one first valve 131 and one second valve 132 in cabin 133, corresponding one first valve 131 and one second valve 132 in cabin 134.The second valve 122 on cabin 124 is connected with Air compressor 200 by pipeline 301, pipeline 301 is provided with air transfer valve 311 and air diverter valve 321; The second valve 122 on cabin 123 is connected with Air compressor 200 by pipeline 302, pipeline 302 is provided with air transfer valve 312 and air diverter valve 322.The second valve 132 on cabin 133 is connected with Air compressor 200 by pipeline 303, pipeline 303 is provided with air transfer valve 313 and air diverter valve 323.The second valve 132 on cabin 134 is connected with Air compressor 200 by pipeline 304, pipeline 304 is provided with air transfer valve 314 and air diverter valve 324.Preferably, air-safety valve 330 is also provided with between pipeline 301 ~ 304 and Air compressor 200.
When conveniently carrying propelling unit, propelling unit is fixed, strut member 150 is provided with fence 140(and sees Fig. 3), similarly, strut member 160 is also provided with fence (fence on strut member 160 is not shown in the drawings).Further, fixing stull 180 and removable stull 170 is provided with between the first floating drum 120 and the second floating drum 130.
Damaged propelling unit when contacting with propelling unit to prevent propelling unit mounting and positioning device 100, propelling unit is placed on after on collet 110, collet 110 can not be interfered with propelling unit external structure, preferably, collet 110 comprises the mounting frame 111 be welded by I-beam section and the propelling unit adapter plate 112 be arranged on mounting frame 111, and propelling unit adapter plate 112 arranges anti-striker 113.
The control principle of propelling unit mounting and positioning device 100 of the present invention is: swim in sea when being loaded with angle of rake propelling unit mounting and positioning device 100, first valve 121,131 is in normally open, open air transfer valve 311,312,313,314, close air diverter valve 321,322,323,324, seawater enters the first floating drum 120 and the second floating drum 130 by the first valve 121,131, in first floating drum 120 and the second floating drum 130, air is discharged from air transfer valve 311,312,313,314, realizes the dive of propelling unit mounting and positioning device 100.Open air diverter valve 321,322,323,324, close air transfer valve 311,312,313,314, Air compressor 200 passes through the second valve 122,132 to the first floating drum 120 and the second floating drum 130 li of injecting compressed airs, seawater is got rid of from the first valve 121,131, realizes the floating of propelling unit mounting and positioning device 100.
Further, the present invention provides the method (being called for short propelling unit installation method under water) utilizing above-mentioned propelling unit mounting and positioning device propelling unit to be installed on buoyancy aid under platform, and in conjunction with consulting Fig. 6 to Fig. 8, its idiographic flow is:
Step S100, loads propelling unit 400 on the collet 110 of above-mentioned propelling unit mounting and positioning device 100;
Step S200, is transported to harbour by the propelling unit mounting and positioning device 100 being mounted with propelling unit 400 and is incorporated to water;
Step S300, adjustment propelling unit mounting and positioning device 100 position is to position propelling unit 400;
Step S400, behind propelling unit mounting and positioning device 100 dive to desired location, draw its to buoyancy aid under platform 500 opposite position;
Step S500, promotes propelling unit 400 to the position connected with buoyancy aid under platform 500; And
Step S600, installation propeller 400 is under platform on buoyancy aid 500 correspondence position.
Specifically, before step S100, preferably first carry out following steps: check that whether the major dimension of propelling unit mounting and positioning device 100 is by installation drawing construction, the connection of inspection removable component whether safety; Check that whether the first valve 121,131 and second valve 122,132 is blocked; Check and whether propelling unit adapter plate 112 is provided with anti-striker 113.Meanwhile, also need to utilize instrument to obtain wind speed (< 6 grades), current (< 2.0m/s), the operating area depth of water (≮ 18m), separately, also need to ensure that operating area sea bed answers clear.In the step s 100, preferably utilize crane to be sling by propelling unit 400, be placed on the collet 111 of propelling unit mounting and positioning device 100, and use bandage to be fixed.
In step s 200, can according to actual conditions, select suitable transportation means, the propelling unit mounting and positioning device 100 loading propelling unit 400 is transported to harbour assigned address, and according to pipeline control principle drawing (see figure 2) connecting line, and airtight test is carried out to pipeline, ensure that pipeline is safe and reliable.Then, propelling unit mounting and positioning device 100 is placed in water, in put procedure, air transfer valve 311,312,313,314 need be closed, open air diverter valve 321,322,323,324, guarantee that propelling unit mounting and positioning device 100 can just float on the surface after entering water.
In step S300, comprise again step S310 and step S320.See Fig. 6, one first hawser 601 of the first floating drum 120 with a platform dive winch is connected by step S310, is connected by the hawser 701 of the second floating drum 130 with a seashore loop wheel machine, and the first floating drum 120 is reclined buoyancy aid 500 under platform.Step S320 is by opening or closing the first valve 121, 131, second valve 122, 132, air transfer valve 311 ~ 314 and air diverter valve 321 ~ 324 are to adjust the first floating drum and the second floating drum, the control principle of the visible aforementioned propelling unit mounting and positioning device 100 of concrete regulative mode, that is, at this step S320, air diverter valve 321 ~ 324 can be closed simultaneously, slowly open air transfer valve 311 ~ 314, the first floating drum 120 and the second floating drum 130 is allowed to intake, under gravity, propelling unit mounting and positioning device 100 is allowed to sink, simultaneously, diver can be arranged to report the floading condition of two floating drums in real time, and utilize the state of switching air escape cock 311 ~ 314 and air diverter valve 321 ~ 324 to regulate the balance of the first floating drum 120 and the second floating drum 130, until propelling unit mounting and positioning device 100 sinks to specified altitude assignment (as to lower 2 meters of baseline).
In step S400, also comprise one second hawser 602 Connection Step of the first floating drum 120 with platform dive winch, and make the second hawser 602 keep tensioning state, see Fig. 7, first hawser 601 winding is on one first reverse wheel 801, and this first reverse wheel 801 is arranged on first jiao 501 of buoyancy aid 500 under platform, and the second hawser 602 winding is on one second reverse wheel 802, second reverse wheel 802 is arranged on second jiao 502 of buoyancy aid 500 under platform, and second jiao 502 relative with first jiao 501.Then, in the gravity of propelling unit 400 and the tractive force double action of the second hawser 602, propelling unit 400 is moved to assigned address, in this process, the floading condition of propelling unit mounting and positioning device 100 must be detected, do not allow any waste motion, until reach position as shown in Figure 8.
Between step S400 and step S500, also comprise step S510, the hawser of hydraulic rockshaft 900 is connected on the corresponding hanger of propelling unit 400 by diver, meanwhile, and the angle of rake socket bottom cover 5031 of diver's underwater demolition; Step S520, carries out position adjustment again to locate propelling unit 400 to propelling unit mounting and positioning device 100.In conjunction with consulting Fig. 8, after the top of propelling unit mounting and positioning device 100 contacts with the lower surface of buoyancy aid under platform 500, can adjust further and (carry out this when adjusting further, still by open or close the first valve 121,131, second valve 122,132, air transfer valve 311 ~ 314 and air diverter valve 321 ~ 324 realize), in this adjustment process, can increase by a plank at the top of propelling unit mounting and positioning device 100, to prevent because installation propeller causes the damage of painting buoyancy aid under platform 500; Then, 3 hydraulic rockshaft 900 Synchronous lifting propelling unit 400 to propelling unit 400 tops can be utilized to start to enter propelling unit socket 503, push away sensor pin 5032 downwards; Continue to promote propelling unit 400, until after propelling unit 400 contacts with sensor pin 5032, more upwards promote a specified altitude assignment.
In step S600, propelling unit 400 and buoyancy aid 500(and hull under platform need be made) fully fastening, about propelling unit 400 being installed on the concrete operations under platform on buoyancy aid 500 correspondence position, adopting the installation of orthodox method owing to being same as prior art, just not repeating at this.
It should be noted that, conveniently the repeated usage of propelling unit mounting and positioning device 100, after step S600, also to have and reclaim propelling unit mounting and positioning device step S700.In this step, comprise step S701, remove removable stull 170, after propelling unit mounting and positioning device 100 is shifted out propelling unit scope, connect removable stull 170 again; Step S702, closes air diverter valve 321 ~ 324, opens air transfer valve 311 ~ 314, propelling unit mounting and positioning device 100 is sunk down into and is separated with buoyancy aid under platform 500; Step S703, towing propelling unit mounting and positioning device 100 is away from the side of a ship exterior domain of buoyancy aid under platform 500; And step S704, open air diverter valve 321 ~ 324, close air transfer valve 311 ~ 314, make propelling unit mounting and positioning device 100 float to realize recycling.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (11)
1. a propelling unit mounting and positioning device, is characterized in that, comprising:
Corresponding to propelling unit to carry angle of rake collet; And
The first floating drum be connected respectively with described collet both sides and the second floating drum;
Wherein, described first floating drum is provided with the first valve injecting water or got rid of by the water in the first floating drum in the first floating drum and the second valve injecting air or got rid of by the air in the first floating drum in the first floating drum, described second floating drum is also provided with the first valve injecting water or got rid of by the water in the second floating drum in the second floating drum and the second valve injecting air or got rid of by the air in the second floating drum in the second floating drum, described second valve is connected with an Air compressor by pipeline, described pipeline is provided with air transfer valve and air diverter valve.
2. propelling unit mounting and positioning device according to claim 1, is characterized in that, described first floating drum is connected with described collet respectively by each self-corresponding strut member with the second floating drum.
3. propelling unit mounting and positioning device according to claim 2, is characterized in that, described first floating drum, the second floating drum connect into U-shaped by described strut member and described collet.
4. propelling unit mounting and positioning device according to claim 2, is characterized in that, described first floating drum and the second floating drum all comprise two cabins, and each cabin is the second valve described in the first valve and described in corresponding all.
5. propelling unit mounting and positioning device according to claim 2, is characterized in that, described strut member is provided with fence.
6. propelling unit mounting and positioning device according to claim 2, is characterized in that, is provided with fixing stull and removable stull between described first floating drum and the second floating drum.
7. propelling unit mounting and positioning device as claimed in any of claims 1 to 6, it is characterized in that, described collet comprises the mounting frame be welded by I-beam section and the propelling unit adapter plate be arranged on mounting frame, and described propelling unit adapter plate is provided with anti-striker.
8. a propelling unit installation method under water, for propelling unit being installed on buoyancy aid under platform, is characterized in that, comprise:
Step S100, loads propelling unit on the collet of propelling unit mounting and positioning device as claimed in claim 1;
Step S200, will be mounted with angle of rake described propelling unit mounting and positioning device and be transported to harbour and be incorporated to water;
Step S300, adjusts described propelling unit mounting and positioning device position to position described propelling unit;
Step SS400, behind described propelling unit mounting and positioning device dive to desired location, draw its to buoyancy aid opposite position under described platform;
Step S500, promotes the position that described propelling unit extremely connects with buoyancy aid under described platform; And
Step S600, installs described propelling unit under described platform on buoyancy aid correspondence position;
Wherein, in described step S300, comprise again:
Step S310, is connected one first hawser of described first floating drum with a platform dive winch, is connected by the hawser of described second floating drum with a seashore loop wheel machine, and described first floating drum is reclined buoyancy aid under described platform; And
Step S320, by opening or closing described first valve, described second valve, described air transfer valve and described air diverter valve to adjust described first floating drum and the second floating drum.
9. propelling unit according to claim 8 installation method under water, it is characterized in that, in described step S400, also comprise the one second hawser Connection Step by described first floating drum and described platform dive winch, wherein, described first hawser winding is on one first reverse wheel, described first reverse wheel is arranged on first jiao of buoyancy aid under described platform, described second hawser winding is on one second reverse wheel, described second reverse wheel is arranged on second jiao of buoyancy aid under described platform, described second jiao with described first jiao relative.
10. propelling unit according to claim 8 installation method under water, is characterized in that, after described step S600, also has and reclaims described propelling unit mounting and positioning device step S700, in this step, comprising:
Step S701, removes removable stull, connects removable stull again after described propelling unit mounting and positioning device is shifted out propelling unit scope;
Step S702, closes described air diverter valve, opens described air transfer valve, described propelling unit mounting and positioning device is sunk down into and is separated with buoyancy aid under described platform;
Step S703, pulls the side of a ship exterior domain of described propelling unit mounting and positioning device away from buoyancy aid under platform;
Step S704, opens described air diverter valve, closes described air transfer valve, and described propelling unit mounting and positioning device is floated.
11. propelling units according to claim 8 installation method under water, is characterized in that, between described step S400 and described step S500, also comprise:
Step S510, is connected to the hawser of hydraulic rockshaft on described angle of rake corresponding hanger, removes described angle of rake socket bottom cover simultaneously;
Step S520, carries out position adjustment again to locate described propelling unit to described propelling unit mounting and positioning device.
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| CN201210251599.7A CN103569311B (en) | 2012-07-19 | 2012-07-19 | Propelling unit mounting and positioning device and propelling unit installation method under water |
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| CN201210251599.7A CN103569311B (en) | 2012-07-19 | 2012-07-19 | Propelling unit mounting and positioning device and propelling unit installation method under water |
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| CN104802925B (en) * | 2014-05-22 | 2017-09-22 | 烟台中集来福士海洋工程有限公司 | The method for dismounting of ocean platform propeller |
| CN104590485B (en) * | 2014-12-19 | 2017-01-04 | 福建东南造船有限公司 | The mounting structure of a kind of propulsion plant and installation method thereof |
| CN105775078B (en) * | 2016-03-08 | 2019-01-01 | 中国石油大学(华东) | Aqueous vapor displacement type underwater equipment auxiliary installation device and installation method |
| CN109606539B (en) * | 2018-10-31 | 2020-11-20 | 沪东中华造船(集团)有限公司 | Roll-in type installation method for air compressor of low-temperature pipe system of LNG ship |
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