CN110104121B - Installation method of movable deck - Google Patents
Installation method of movable deck Download PDFInfo
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- CN110104121B CN110104121B CN201910418368.2A CN201910418368A CN110104121B CN 110104121 B CN110104121 B CN 110104121B CN 201910418368 A CN201910418368 A CN 201910418368A CN 110104121 B CN110104121 B CN 110104121B
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- movable deck
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
Abstract
The invention relates to an installation method of a movable deck, comprising the following steps of welding a supporting seat; step two, the guide strips are vertically arranged with the upright post panel and are welded and fixed; step three, the broadside sections and the upright posts are respectively and independently folded in the dock; step four, welding the upright post; step five, after the movable deck is hoisted and fixed on the fixed supporting seat at the normal working position, whether the clear height of the lower deck of the movable deck meets the requirement at different working positions is checked; step six, the guide blocks are arranged on the deck face, matched with the guide strips, of the movable deck, the guide blocks and the guide strips form a clamping type connecting mechanism capable of moving up and down, the ship stand columns are separated from the ship body structure, namely the stand columns are not installed during the building of the ship body sections, the stand columns are independently hoisted during the large folding, the problem that the building errors of the ship body sections influence the accuracy of the structural correspondence and the verticality of the stand column installation is avoided, a large amount of repair work can be avoided, and the installation period of the movable deck is shortened.
Description
Technical Field
The invention relates to the field of shipbuilding, in particular to an installation method of a movable deck.
Background
7800PCTC ro-ro vessel has 12 layers of decks capable of loading vehicles, wherein the fourth layer 3, 5, 7 and 9 is a movable deck which can be lifted by a jacking vehicle, and 3 decks are lifted by an electric winch to meet the requirement that the next deck is used for parking a large vehicle.
For the installation of multi-layer movable decks, the installation steps are complicated, and how to improve the installation efficiency needs to provide a new installation method.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an installation method of a movable deck.
In order to achieve the purpose, the invention provides the following technical scheme: a method of installing a removable deck, comprising the steps of:
firstly, after marking-out positioning and inspection are carried out on the broadside section and the upright column according to the height position of the movable deck, welding and fixing a fixed support seat used at a first working position of the movable deck and a semi-automatic support seat used at a second working position or a storage position with the upright column;
step two, the guide strips are vertically arranged with the upright post panel and are welded and fixed;
step three, the broadside sections and the upright posts are respectively and independently folded in the dock;
measuring and scribing at the upright columns of all the fixed decks, determining the welding positions of the upright columns, scribing 100mm beyond the welding positions of the upright columns, making ocean punching marks, sequentially hoisting each upright column on the corresponding fixed deck in a dock according to the ocean punching marks, temporarily positioning and welding the lower end of each upright column on the lower deck, hoisting the whole fixed deck at the upper end of each upright column, and temporarily supporting and fixing the upper end of each upright column and the whole fixed deck at the upper end;
step five, after the movable deck is hoisted and fixed on the fixed supporting seat at the normal working position, whether the clear height of the lower deck of the movable deck meets the requirement at different working positions is checked;
and step six, arranging a guide block on the deck surface of the movable deck matched with the guide strip, and forming a clamping type connecting mechanism capable of moving up and down together with the guide strip.
The allowable height difference of the fixed supporting seat or the movable supporting seat at the same working position or the same storage position on the same movable deck is +/-10 mm.
The fixed supporting seat and the semi-automatic supporting seat are respectively taken as a measuring reference point from the upper end of the upright post and the upper end of the subsection before installation, and laser longitude and latitude is adopted for measurement and positioning.
After the segments and the upright posts are folded in the dock, a base plate is additionally arranged above the supporting seat according to the deformation of the movable deck or the deviation value of the mounting height of the supporting seat.
Each guide strip is divided into 3 sections, the thickness of the upper section and the lower section is 50mm, and the thickness of the middle section is 30 mm.
The installation accuracy requirement of the guide strip is as follows:
the installation requirement of the guide strip on the same stand column is as follows:
a. the perpendicularity tolerance A between each guide strip and the plane of the stand column is as follows: plus or minus 0.5 mm;
b. the parallelism tolerance B between two guide strips on the same stand column is as follows: plus or minus 2 mm;
c. the distance tolerance between 2 transverse guide bars on the same upright post is 480 [0, +5] mm,
the installation tolerance requirements of 2 guide strips at the same transverse position of two vertical columns which are longitudinally adjacent to the ship body are as follows:
a. the vertical adjacent 2 stands of hull, 2 relative gib block depth of parallelism tolerance C and D are: plus or minus 5 mm;
b. the displacement deviation of 2 opposite guide bars of 2 vertical adjacent columns of the ship body is as follows: the thickness of the film is 0 plus or minus 10mm,
the parallelism tolerance between the guide strip on the upright and the adjacent bulkhead structure requires:
a. the parallelism tolerance E of the guide rail to the bulkhead is: 5 mm.
When the stand column is welded, after the seam welding of all the large closure structures of the whole layer of the fixed deck at the upper end in the dock is carried out, the verticality of the stand column is measured, whether the stand column structure and the deck structure are aligned up and down is checked, and the upper and lower connection deviation, the verticality and other measurement data are controlled within the range of quality inspection standard tolerance.
Installing a guide block:
(1) before the movable deck is hoisted, measuring whether the height tolerance of each fixed supporting seat and each movable supporting seat meets the requirement, wherein the requirement is that the height difference between the fixed supporting seats or the movable supporting seats at the same height position on the same deck is +/-10 mm;
(2) after all the movable decks on each layer are hoisted in place, adjusting the gaps and the height difference between the movable decks and the bulkhead structures to determine whether the requirements are met, and trimming and cutting the too small gaps of the decks according to the following standards;
a. gaps between the movable decks or between the movable decks and bulkheads/fixed decks: 30 plus or minus 10 mm;
b. height difference between the mobile decks: 15 mm. If this value is exceeded, the thickness of the adjusting shim plate can be increased or decreased on the support.
The installation method of the movable deck further comprises a fixed hook,
after temporarily positioning the hook according to the up-and-down movement position of the movable deck, the following operations are carried out on the hook,
a. before the deck is lifted, the hook inhaul cable is released firstly, so that the hook is in a free vertical state, and the hook can be automatically hooked with eye rings on the deck when the deck is lifted;
b. when the deck is lowered, the deck is lifted a little, the hook inhaul cable is pulled to separate from the eye plate, then the deck is lowered,
according to the operating condition, adjust couple position and installation angle, with the deck round steel of couple eye board center alignment below, central deviation scope 5 mm.
The installation method of the movable deck further comprises the steps of installing folding rods, aligning the centers of eye plates of the folding rods to the centers of eye plates below the folding rods after the folding rods and the corresponding movable deck are determined, adjusting the positions and the installation angles of the upper eye plates and the lower eye plates of the folding rods according to the up-and-down movement and the operation state of the movable deck, and aligning the centers of the eye plates of the folding rods to the fixed eye plates of the upper fixed deck and the lower fixed deck after the eye plates are welded.
The invention has the beneficial effects that: the ship stand is separated from a ship body structure, namely, the stand is not installed when the ship body is built in a segmented mode, the stand is hoisted independently when the ship body is folded greatly, the problem that the building error of the ship body segment influences the structural correspondence and the verticality of the stand column installation is avoided, a large amount of repair work can be avoided, and the installation period of a movable deck is shortened.
The main column and the movable deck are independently assembled in a large folding mode, and the influence of the welding deformation of the ship body section on the stand column and the movable deck can be avoided. The installation quality of the movable deck is controlled and ensured, so that the use and operation of the movable deck can better meet the requirements of customers.
The supporting seat is positioned and installed on the upright post and the segments, so that the movable deck can be directly hoisted after the upright post is folded and fixed, and other additional supports are not needed. Nearly 500 temporary mobile deck support structures are avoided. The construction cost is saved, and the installation working hours are reduced.
Drawings
Fig. 1 is a schematic view of an 3/5 typical node of the mobile deck arrangement of the present invention.
Fig. 2 is a schematic view of an 7/9 typical node of the mobile deck arrangement of the present invention.
Fig. 3 is a schematic diagram of the guide strip (guide rail) welded joint requirements of the present invention.
Fig. 4 is a schematic view of a guide block component of the present invention.
Fig. 5 is a schematic view of the hook installation of the present invention.
Fig. 6 is a schematic view of the folding bar installation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
7800PCTC ro-ro vessel has 12 layers of decks capable of loading vehicles, wherein the fourth layer 3, 5, 7 and 9 is a movable deck which can be lifted by a jacking vehicle, and 3 decks are lifted by an electric winch to meet the requirement that the next deck is used for parking a large vehicle. The jacking position of the jacking car can be marked on the lower deck surface.
The first working position of the movable deck is a fixed supporting seat, and the second working position and the collecting position are semi-automatic supporting seats. The semi-automatic supporting seat is pulled and pulled by a nylon rope.
Each movable deck typically has 2 sets of guides consisting of guide rails mounted on columns or bulkheads and guide blocks mounted on the deck.
Deck 3 (Item H), wherein 3 decks have 18 movable decks, one of which is a power-driven Deck (Item L) and has 1 working position and 1 collection position;
deck 5 (Item I) 5, wherein the Deck 5 has 27 movable decks, one of which is a power-driven Deck (Item N) and has 2 working positions and 1 collection position, and the height difference between the two working positions is 300 mm;
deck 7 (Item J), wherein 7 decks have 42 movable decks, 2 working positions and 1 collection position, and the height difference of the two working positions is 500 mm;
deck 9 (Item K) 9 the Deck has 39 movable decks, one of which is a power Deck (Item M) and has 2 working positions and 1 collection position, and the height difference between the two working positions is 200 mm.
The movable decks all weigh less than 25 t.
Preparation work before installation
The movable deck should be hoisted in the dock before the upper deck of the movable deck is not folded.
After the upright columns of the movable decks of each layer are manufactured and coated, the positioning sizes of the fixed supporting seats, the semi-automatic supporting seats and the storage position supporting seats are marked on the upright columns or the broadside structures, and the positions of the positioning sizes of the supporting seats of the decks of each layer are marked on corresponding nodes.
The invention provides an installation method of a movable deck, which comprises the following steps:
firstly, after marking-out positioning and inspection are carried out on the broadside section and the upright column according to the height position of the movable deck, welding and fixing a fixed support seat used at a first working position of the movable deck and a semi-automatic support seat used at a second working position or a storage position with the upright column;
the supporting seat of the movable deck is divided into a fixed supporting seat and a semi-automatic supporting seat, the fixed supporting seat is used at the first working position of the movable deck, and the semi-automatic supporting seat is used at the second working position and the collection position.
The fixed supporting seat and the semi-automatic supporting seat are completely installed in the segmentation stage, so that the workload in a dock is reduced, and the safety of fixing after the movable deck is hoisted is improved.
When the fixed supporting seat and the semi-automatic supporting seat are installed, marking, positioning and inspecting are carried out on the broadside subsection and the upright column according to the height position of the movable deck, and then welding is carried out. Considering that the welding shrinkage and the layer height compensation are added at the lower opening of the upright column and the lower opening of the subsection, the upper end of the upright column and the upper end of the subsection are taken as measuring reference points before the supporting seat is installed, and laser longitude and latitude is adopted for measuring and positioning.
The allowable height difference of the fixed supporting seat or the movable supporting seat at the same working position/storage position on the same movable deck is as follows: 10 mm.
The contact length of the semi-automatic supporting seat and the movable deck is 70 mm-90 mm.
And each layer of contact length between the fixed supporting seat and the movable deck is different, and the contact length is as follows:
3, deck: 70-95 mm; 5 Deck/7 Deck: 70-100 mm; 9 deck: 70-110 mm.
After the segments and the upright columns are folded in the dock, because the movable deck deforms or the mounting height of the supporting seat exceeds the allowable deviation, a base plate with a certain thickness is additionally arranged above the supporting seat according to the deviation value so as to ensure that the movable deck is in the same horizontal height.
And arranging graph nodes according to the interfaces of each layer of movable decks, using a laser theodolite to make positioning dimension lines of the mounting positions of the supporting seats on the front transverse bulkhead, the rear transverse bulkhead and the port and starboard longitudinal bulkheads of the cargo hold, and if part of the supporting seats need to be lifted by a hoist in the mounting process, mounting a temporary support above the supporting seats for lifting the supporting seats.
Step two, the guide strips are vertically arranged with the upright post panel and are welded and fixed;
the movable deck is provided with 2 guide bars. The guide strips can ensure that the deck can limit the position deviation of the movable deck when the deck is lifted and the ship tilts vertically and horizontally, and can resist the transverse force transmitted by the deck and a loading vehicle.
Each guide strip is divided into 3 sections, the thickness of the upper section and the lower section is 50mm, and the thickness of the middle section is 30 mm.
The upper and lower sections are in working or stowed positions of the movable deck and are subjected to lateral forces transmitted by the deck and the vehicle, so that a 50mm plate is used and a small clearance is maintained with the guide blocks of the deck surface. The middle guide rail only plays a role of preventing the deck from deviating when the deck is lifted, so that a 30mm thick plate is adopted.
According to the installation and positioning requirements of the guide strip, the vertical column is positioned and installed before being docked and folded, and the guide strip is perpendicular to the panel of the vertical column during installation. And opening a welding groove of the guide strip according to the requirement of the node during welding. And in the installation process, the welding deformation of the guide strip is controlled.
Welding requirements of the guide strips:
see figure 3 for details. The upper and lower sections of 50mm thick parts need to be opened, and 30mm does not need to be opened.
The installation accuracy requirement of the guide strip is as follows:
(1) the installation requirements of the guide strips on the same upright post are as follows:
a. the perpendicularity tolerance A between each guide strip and the plane of the stand column is as follows: plus or minus 0.5 mm;
b. the parallelism tolerance B between two guide strips on the same stand column is as follows: plus or minus 2 mm;
c. the distance tolerance between 2 transverse guide bars on the same upright post is 480 [0, +5] mm.
(2) The two vertical columns adjacent to the hull in the longitudinal direction have the installation tolerance requirement of 2 guide bars at the same transverse position, namely 2 guide bars acting on the same movable deck:
a. the vertical adjacent 2 stands of hull, 2 relative gib block depth of parallelism tolerance C and D are: plus or minus 5 mm;
b. the displacement deviation of 2 opposite guide bars of 2 vertical adjacent columns of the ship body is as follows: 0 + -10 mm.
(3) The parallelism tolerance between the guide strip on the upright and the adjacent bulkhead structure requires:
a. the parallelism tolerance E of the guide rail to the bulkhead is: 5 mm.
Step three, the broadside sections and the upright posts are respectively and independently folded in the dock;
measuring and scribing at the upright columns of all the fixed decks, determining the welding positions of the upright columns, scribing 100mm beyond the welding positions of the upright columns, making ocean impact marks, sequentially hoisting each upright column on the deck in a dock according to the ocean impact marks, temporarily positioning and welding the lower end of each upright column on the lower deck, hoisting the whole fixed deck at the upper end of each upright column, and temporarily supporting and fixing the upper end of each upright column and the whole fixed deck at the upper end of each upright column;
after the movable deck is manufactured, the movable deck is hoisted in the dock in advance before the fixed deck above the movable deck is hoisted. Before the movable deck is hoisted, the height difference between the fixed supporting seats of each deck is measured by a laser theodolite, and if the height difference exceeds +/-10 mm, the height of the fixed supporting seats is required to be adjusted.
After the movable decks are hung on the fixed supporting seats at normal working positions, the height difference between each movable deck and the two movable decks is detected, and if the difference value exceeds 15mm, the overall height of the deck plates is adjusted by means of initiating calibration or adding a base plate with the height of 6mm to the supporting seat of the lower deck.
After the movable deck is hung on the fixed supporting seat at the normal working position, whether the deck is horizontal or not is detected, only the middle arch is allowed to deform, the deformation is less than or equal to 10mm, and the sagging deformation is not allowed to occur.
And checking whether the clear height of the deck below the movable deck at different working positions meets the requirements of the drawing.
Step five, after the movable deck is hoisted and fixed on the fixed supporting seat at the normal working position, whether the clear height of the lower deck of the movable deck meets the requirement at different working positions is checked;
and step six, arranging a guide block on the deck surface of the movable deck matched with the guide strip, and forming a clamping type connecting mechanism capable of moving up and down together with the guide strip.
The guide block is arranged on the deck surface at the position where the guide rail and the movable deck act, and consists of a guide plate, a nylon slide block, a U-shaped groove, a bolt and a nut and 3 toggle plates. These parts must therefore be assembled into an integral guide block before being installed on the deck.
Installing a guide block:
(1) before the movable deck is hoisted, whether the height tolerance of each fixed supporting seat and each movable supporting seat meets the requirement is measured, and manufacturers require that the height difference between the fixed supporting seats or the movable supporting seats at the same height position on the same deck is +/-10 mm.
(2) After all the movable decks on each layer are hoisted in place, the gaps and the height differences between the movable decks and the bulkhead structures are adjusted to meet the requirements, and the gaps with too small decks are trimmed and cut according to the following standards.
a. Gaps between the movable decks or between the movable decks and bulkheads/fixed decks: 30 plus or minus 10 mm;
b. height difference between the mobile decks: 15 mm.
If the number is exceeded, the thickness of the adjusting shim plate can be increased or decreased on the supporting seat, and the adjusting shim plate can be replaced if the adjusting shim plate is installed.
(3) After the gap measurement between the movable decks meets the requirements,
the guide block is temporarily positioned on the movable deck, so that the gap between the guide block and the guide strip meets the requirement.
Considering that when the movable deck moves at different heights up and down, poor contact is generated between the guide block and the guide strip, excessive friction is caused, the up-and-down movement of the movable deck is blocked, and a special jacking vehicle device can be used for carrying out jacking and descending simulation operation experiments on the movable deck before the guide block is installed. Before the movable deck is lifted, the guide rail (50 mm thick part) needs to be fully lubricated by grease so as to prevent the nylon sliding block from being excessively worn.
After the guide block is adjusted according to experimental data, gaps in three directions of the gaps between the guide block sliding block and the guide strip are required to be 3 mm. And after the guide blocks of all the movable decks on each layer are adjusted, full welding is carried out for fixing.
Some movable decks have no space for installing the supporting seats, so that hooks are arranged to replace the supporting seats. The hook is equivalent to the support seat at the collection position. The mounting steps of the hook are as follows:
after temporarily positioning the hook according to the up-and-down movement position of the movable deck, the following operations are carried out on the hook,
a. before the deck is lifted, the hook inhaul cable is released, so that the hook is in a free vertical state. When the deck is lifted, the hook can be automatically hooked up with the eye ring on the deck.
b. When the deck is lowered, the deck needs to be lifted up a little, the hook inhaul cable is pulled to be separated from the eye plate, and then the deck is lowered.
And according to the operation state, the position and the installation angle of the hook are adjusted. The center of the hook eye plate is aligned with the deck round steel below, and the center deviation range is +/-5 mm. After the eye plate is welded, the hook is assembled, whether the hook can be smoothly pulled by the pull rope or not is tested after the installation is finished, each rope can be freely released, the work cannot be influenced, and the ropes cannot be damaged by surrounding structures. Otherwise, the relevant pulley or guide ring is adjusted.
The folding rod is used as a support seat of the working position, and when the folding rod is lifted from the first working position to the second working position, the pin needs to be pulled out by manual operation and inserted into the bolt hole of the second position.
After the movable deck corresponding to the position of the folding rod is positioned and confirmed, the center of the eye plate of the folding rod is aligned with the center of the eye plate below the folding rod, and the center deviation range is +/-5 mm. And assembling corresponding folding rods after the eye plates are welded.
According to the up-and-down movement and the operation state of the movable deck, the positions and the installation angles of the upper and lower eye plates of the folding rod are adjusted.
After the eye plates are welded, the centers of the folding rod eye plates are aligned with the fixed eye plates of the upper fixed deck and the lower fixed deck. And after the central deviation range is checked to be +/-5 mm, installing a folding rod eye plate bolt.
And (3) installing and welding the movable supporting seat and the rope guide device of the hook, and installing accessories such as a guide wheel, a shackle, a steel ring, a pull rope, a spring and the like.
All movable supporting seats and hooks are operated to ensure normal work, and if the movable supporting seats and the hooks cannot work normally, the positions of the rope pulleys or the guide rings can be adjusted.
The movable deck is lifted to the semi-automatic bearer position at each level, checking and ensuring that the movable bearers have been fully folded as the deck plate passes the working height. And simultaneously checking the position matching and the height difference of the supporting seat and the movable deck, and adjusting the movable supporting seat if necessary. It is checked whether the rope on the rope guide is fully retracted.
The mobile deck was lifted and all the functions of the semi-automatic bearing and semi-automatic bearing release were checked, repeated several times.
The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.
Claims (10)
1. A method for installing a movable deck is characterized in that: which comprises the following steps:
firstly, after marking-out positioning and inspection are carried out on the broadside section and the upright column according to the height position of the movable deck, welding and fixing a fixed support seat used at a first working position of the movable deck and a semi-automatic support seat used at a second working position or a storage position with the upright column;
step two, the guide strips are vertically arranged with the upright post panel and are welded and fixed;
step three, the broadside sections and the upright posts are respectively and independently folded in the dock;
measuring and scribing at the upright columns of all the fixed decks, determining the welding positions of the upright columns, scribing 100mm beyond the welding positions of the upright columns, making ocean punching marks, sequentially hoisting each upright column on the corresponding fixed deck in a dock according to the ocean punching marks, temporarily positioning and welding the lower end of each upright column on the lower deck, hoisting the whole fixed deck at the upper end of each upright column, and temporarily supporting and fixing the upper end of each upright column and the whole fixed deck at the upper end;
step five, after the movable deck is hoisted and fixed on the fixed supporting seat at the normal working position, whether the clear height of the lower deck of the movable deck meets the requirement at different working positions is checked;
and step six, arranging a guide block on the deck surface of the movable deck matched with the guide strip, and forming a clamping type connecting mechanism capable of moving up and down together with the guide strip.
2. Method for installing a movable deck according to claim 1, characterized in that: the allowable height difference of the fixed supporting seat or the movable supporting seat at the same working position or the same storage position on the same movable deck is +/-10 mm.
3. Method for installing a movable deck according to claim 1, characterized in that: the fixed supporting seat and the semi-automatic supporting seat are respectively taken as a measuring reference point from the upper end of the upright post and the upper end of the subsection before installation, and laser longitude and latitude is adopted for measurement and positioning.
4. Method for installing a movable deck according to claim 1, characterized in that: after the segments and the upright posts are folded in the dock, a base plate is additionally arranged above the supporting seat according to the deformation of the movable deck or the deviation value of the mounting height of the supporting seat.
5. Method for installing a movable deck according to claim 1, characterized in that: each guide strip is divided into 3 sections, the thickness of the upper section and the lower section is 50mm, and the thickness of the middle section is 30 mm.
6. Method for installing a movable deck according to claim 1 or 5, characterized in that: the installation accuracy requirement of the guide strip is as follows:
the installation requirement of the guide strip on the same stand column is as follows:
a. the perpendicularity tolerance A between each guide strip and the plane of the stand column is as follows: plus or minus 0.5 mm;
b. the parallelism tolerance B between two guide strips on the same stand column is as follows: plus or minus 2 mm;
c. the distance tolerance between 2 transverse guide bars on the same upright post is 480 [0, +5] mm,
the installation tolerance requirements of 2 guide strips at the same transverse position of two vertical columns which are longitudinally adjacent to the ship body are as follows:
a. the vertical adjacent 2 stands of hull, 2 relative gib block depth of parallelism tolerance C and D are: plus or minus 5 mm;
b. the displacement deviation of 2 opposite guide bars of 2 vertical adjacent columns of the ship body is as follows: the thickness of the film is 0 plus or minus 10mm,
the parallelism tolerance between the guide strip on the upright and the adjacent bulkhead structure requires:
a. the parallelism tolerance E of the guide rail to the bulkhead is: 5 mm.
7. Method for installing a movable deck according to claim 1, characterized in that: when the stand column is welded, after the seam welding of all the large closure structures of the whole layer of the fixed deck at the upper end in the dock is carried out, the verticality of the stand column is measured, whether the stand column structure and the deck structure are aligned up and down is checked, and the upper and lower connection deviation, the verticality and other measurement data are controlled within the range of quality inspection standard tolerance.
8. Method for installing a movable deck according to claim 1, characterized in that: installing a guide block:
(1) before the movable deck is hoisted, measuring whether the height tolerance of each fixed supporting seat and each movable supporting seat meets the requirement, wherein the requirement is that the height difference between the fixed supporting seats or the movable supporting seats at the same height position on the same deck is +/-10 mm;
(2) after all the movable decks on each layer are hoisted in place, adjusting the gaps and the height difference between the movable decks and the bulkhead structures to determine whether the requirements are met, and trimming and cutting the too small gaps of the decks according to the following standards;
a. gaps between the movable decks or between the movable decks and bulkheads/fixed decks: 30 plus or minus 10 mm;
b. height difference between the mobile decks: 15mm, and if this value is exceeded, the thickness of the adjusting shim plate can be increased or decreased on the support base.
9. Method for installing a movable deck according to claim 1, characterized in that: the installation method of the movable deck further comprises a fixed hook,
after temporarily positioning the hook according to the up-and-down movement position of the movable deck, the following operations are carried out on the hook,
a. before the deck is lifted, the hook inhaul cable is released firstly, so that the hook is in a free vertical state, and the hook can be automatically hooked with eye rings on the deck when the deck is lifted;
b. when the deck is lowered, the deck is lifted a little, the hook inhaul cable is pulled to separate from the eye plate, then the deck is lowered,
according to the operating condition, adjust couple position and installation angle, with the deck round steel of couple eye board center alignment below, central deviation scope 5 mm.
10. Method for installing a movable deck according to claim 1, characterized in that: the installation method of the movable deck further comprises the steps of installing folding rods, aligning the centers of eye plates of the folding rods to the centers of eye plates below the folding rods after the folding rods and the corresponding movable deck are determined, adjusting the positions and the installation angles of the upper eye plates and the lower eye plates of the folding rods according to the up-and-down movement and the operation state of the movable deck, and aligning the centers of the eye plates of the folding rods to the fixed eye plates of the upper fixed deck and the lower fixed deck after the eye plates are welded.
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| CN110104121B true CN110104121B (en) | 2020-03-10 |
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| CN111891314B (en) * | 2020-07-27 | 2022-05-10 | 广船国际有限公司 | Construction method for adjusting layer height of garage of ro-ro passenger ship |
| CN114735153A (en) * | 2022-04-06 | 2022-07-12 | 江南造船(集团)有限责任公司 | Hoisting and positioning process and device for movable deck of roll-on-roll-off ship |
| CN114802647A (en) * | 2022-04-27 | 2022-07-29 | 广船国际有限公司 | Installation method of movable springboard for ship |
Citations (3)
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| CN110104121A (en) | 2019-08-09 |
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