KR20070004612A - Process for the assembly of a scaffolding structure and relative scaffolding structure - Google Patents

Abstract

In the process for the assembly of a scaffolding structure for the laying of the coating of the hold of a ship for the transportation of liquefied natural gas, polygonal modules of the structure are assembled in blocks outside of the hold, and then the blocks are assembled together inside the hold. ® KIPO & WIPO 2007

Description

PROCESS FOR THE ASSEMBLY OF A SCAFFOLDING STRUCTURE AND RELATIVE SCAFFOLDING STRUCTURE}

The present invention relates to a scaffolding structure and a method of assembling a scaffolding structure which is laid to coat a dock of a vessel for liquefied natural gas (LNG) transport.

Currently, ships for transporting liquefied natural gas have a dock where a coating suitable for containing liquefied gas is thermally insulated.

In general, such coatings comprise a first layer of boxwood made of marine reinforced ply with an internal grid forming cell comprising expanded pearlite treated with silicon, from the outside to the inside, and the first waterproof metal The film, the boxwood of the second layer having a thickness different from the boxwood of the first layer, and finally a second waterproof metal film.

In order to carry out the laying of the coating, during laying the coating, the scaffold is used at a distance from the inner surface of the dock by an amount compatible with the thickness of the laid coating or by an amount compatible with the treatment anticipated in the various laying steps.

In particular, the length of the support leg of the scaffolding structure needs to be changed when raised from the bottom of the dock and when placed on the bottom coating of the dock.

Conventional scaffolds are not suitable because as the assembly of the coating proceeds, they are not very flexible to fit various shapes and sizes.

Conventional scaffolds are also assembled entirely within the ship's dock, where everyone involved in the assembly and often all the necessary machinery, such as gantry cranes, cranes, conveyors, etc. It needs a storage space to fit in.

Logistics of transport, storage of parts, assembly and disassembly of scaffolds, and the creation of coatings are themselves inherently complicated to realize the whole work, and when both operations are carried out simultaneously, Coordinating the realization inevitably becomes complicated.

All this also increases the difficulty of assembly, leads to prolongation of time and worsens the overall coating cost of the dock.

In addition, conventional scaffolds do not always guarantee extreme utility, simplicity, speed and safety in repeating and continuous assembly and disassembly, while at the same time extremely complicating the integrity of the often laid coatings.

Finally, conventional scaffolding does not always fully meet the demand for flexibility, while on the other hand it does not meet the need to produce a structure that is extremely stable and robust to all configurations and / or dimensions.

It is an object of the present invention to provide a scaffold structure and a method of assembling the scaffold structure, which are laid to coat the dock of a natural gas transport ship, which can solve the above problems of the prior art.

In order to achieve the above object, the present invention realizes a method of assembling a scaffold structure for laying a coating on a dock of a natural gas transport ship, and is extremely flexible in assembling and disassembling a scaffold for laying a coating. Is realized.

Another object of the present invention is to provide a scaffolding structure and a method of assembling a scaffolding structure, which are independently assembled and disassembled in a ship construction step and lays a coating on a dock for laying a coating on a dock of a natural gas transport ship.

Another object of the present invention is to provide a method for assembling a scaffold structure and a scaffold structure, in which the coating, the storage of parts, the mounting and detachment of the scaffold and the laying of the coating are simple for laying the coating on the dock of a natural gas transport vessel. .

It is yet another object of the present invention to provide a method for assembling scaffolding and scaffolding structures for optimizing the use of materials and manpower required for constructing and detaching scaffolds and laying coatings for laying coatings on the docks of natural gas transport vessels. There is.

It is yet another object of the present invention to build a scaffold for scaffolding and scaffolding assembling the scaffold structure and scaffolding structure, which optimizes the time for constructing and detaching the scaffold and laying the coating and saving the fixed cost of such work. To provide.

It is yet another object of the present invention to provide coatings on the docks of natural gas transport vessels, often with extreme practicality, simplicity, speed and safety in the repeated and continuous assembly and disassembly of scaffolds. It is to provide a scaffold structure and a method of assembling the scaffold structure to ensure the integrity of the coating to be laid.

It is yet another object of the present invention to provide a coating on the dock of a vessel for transporting natural gas, while always fully meeting the demand for flexibility, while on the other hand it is extremely stable and robust in all configurations and / or dimensions. It is to provide a scaffolding structure and a method of assembling the scaffolding structure to meet the needs for producing.

These and other objects according to the invention provide a dock of a natural gas transport ship, characterized in that the polygonal module of the structure is assembled into blocks outside the dock, and then the blocks are assembled inside the dock. It is achieved by a method of assembling the scaffold structure that is laid down for coating.

The invention also has an assembled block of polygonal modules of the above structure, wherein the mechanical coupling means between the blocks is realized via a male / female coupling member for coating a dock of a natural gas transport ship. Disclosed is a scaffold structure which is laid to

Other features and advantages of the present invention will be apparent from the preferred embodiments shown and described for the non-limiting purposes with reference to the accompanying drawings for the scaffold structure and scaffold structure assembly method for laying a coating on the dock of a natural gas transport vessel. It is not limited to this.

1 shows a typical cross-sectional view of a scaffold structure according to a preferred embodiment of the present invention.

FIG. 2 shows a typical division of the block shown in dashed lines, used to assemble the cross section of FIG. 1.

3 a and b show an exploded and assembled structure of an example of an auto centering means between the blocks of the FIG. 1 structure, respectively.

4 is a top cross-sectional view of the leg of the FIG. 1 structure.

5 is a front view showing an example of means for allowing horizontal sliding of the working surface in the shelter of the side surface of the dock on each plane of the FIG. 1 structure.

FIG. 6 illustrates a support leg of a structure having a system for releasing pressure on a foot. FIG.

In the accompanying drawings, the structure of the scaffold 1 for laying a coating on the dock of a ship for transporting natural gas is indicated by reference numeral 1 as a whole.

The scaffold 1 structure consists of blocks 2, which in turn are composed of polygonal modules.

The assembly of the modules, each of which is combined to form an individual block 2, is preferably done outside the ship's dock 4, while the blocks 2 thus obtained are assembled together inside the ship's dock 4.

This offers several advantages.

Firstly, since a large maneuvering space remains inside the ship's dock 4, two tasks can be carried out simultaneously without disturbing or hindering other work, so the scaffold 1 structure can be assembled and disassembled and coated on the dock. The laying of can be carried out independently at the ship's construction stage.

Secondly, the transport of the scaffold, the storage, mounting and detachment of parts, and the laying of coatings are simplified.

In particular, it is easy to separately manage the first stockyard outside the dock 4 for assembling the module of the block 2 and the second stockyard in the dock 4 of the ship for assembling the block 2 separately.

Third, since the activity of the worker team working outside the ship's dock 4 can be spatially separated from the worker team working inside the dock 4, the materials and materials needed to assemble and disassemble the scaffold and lay the coating Optimize the use of human resources.

Fourthly, minimizing idle time in the use of equipment needed to simultaneously execute work on both external and internal yards optimizes the time required to build and dismantle the scaffolding and lay the coating, You can save.

The assembled block 2 comprises a horizontal working surface 3 of the upper apex for laying the side coating of the dock, a lower horizontal working surface 6 to be lifted from the supporting base of the structure and a side surface of the dock 4; It forms at least one peripheral framework 5 which faces.

The peripheral framework 5 of the scaffold 1 structure has at least one access space 43 accessible to the working surface 6.

The peripheral framework 5 also includes spacer means 51 from the side surface of the dock 4, which has a platform 52 which is arranged to be adjustable to each other at various heights.

Each platform 52 has support elements 53 each formed by two tubes having circular cross sections connected to each other so as to be guided along a well-formed axis through a double sliding roller 54 with a throat 55. .

The scaffold 1 structure also has strut means 56 suitable for reacting to the acting horizontal load.

The strut means 56 also has an extendable axis 57 which is hinged to the scaffold 1 structure, which is perpendicular to the surface of the dock 4 with respect to the mating support plate 58.

The scaffold 1 structure also has a plurality of first and second rows of height regulating legs 7, 8 suitable for supporting the entire structure.

The support legs 7, 8 of the structure are in their fully elongated initial state lying with the feet 44, 45 on the bottom surface of the dock 4 and the feet 44, 45 on the coating of the bottom of the dock 4. ) Between the retracted final position lying together.

The balance of the scaffold 1 structure, which is ensured thanks to the assembly of the realized form, is achieved when all the foot 44, 45 is placed on the top surface of the coating of the bottom of the dock 4 while laying the bottom coating of the dock 4. Allow the pair of opposed legs 7, 8 to rise continuously.

Each leg 7, 8 has a large screw 46 with a rounded head 47 that engages in the seat 48 of the corresponding foot 44, 45 at one end.

Round head 47 and mating seat of legs 7 and 8 to limit contact wear and to allow foot 44 and 45 to pivot to recover possible tilt between the legs 7 and 8 and the support base. It is desirable to have a different curvature between the 48.

Between the legs 7 and 8 and the corresponding support feet 44 and 45 and the side jacks 49 and 50 there is a device 60 for dispensing the weight of the scaffold with large screws 46 to facilitate adjustment. It can be controlled hydraulically or manually.

A pump with a high precision pressure gauge (not shown) makes it possible to read the actual pressure on the legs 7, 8 with high accuracy when descending integrally with the side jacks 49, 50. This allows to constantly monitor the pressure in the foot 44, 45 on the coating.

The feet 44 and 45 have a rectangular plane dimensioned to create a contact pressure with the coating of the bottom of the dock 4 below the predetermined value.

The module has a straight element with a longitudinal extension and a hollow polygonal cross section that simplifies the exact positioning in the joining and / or welding operations.

At least a first type of the module 11, which is specifically intended for the block 2 constituting the peripheral framework 5, forms a “U” shape with the first and second upstanding members 12, 13. A first through an opposing connecting plate (19, 20) having a connected cross piece (14) and welded to the first diagonal member (15) and located at the intersection between the first and second diagonal members (15,16). Two half-members 17, 18 are fixed to the diagonal member 15, and are provided with the entire first and second diagonal members 15, 16.

A second form of at least one of the modules, specially intended for the block 2 connecting between the peripheral framework 5 and the horizontal working surface 6 or the upper vertical plane 3, is a triangularly connected upright member ( 22 and a second suitable connection between the cross piece 23 and the first diagonal member 24 and the cross piece 23 at the midpoint of the upstanding member 22 and the first diagonal member 24. Diagonal member 25 is provided.

A third form of at least one of the modules 26, specially intended for the block 2 constituting the horizontal working surface 6 or the horizontal upper plane 3, is a first connected to form a “C” shape. And first and second diagonal members 30, 31 connected to an end of the first cross section 27 at the midpoint of the second cross piece 27, the upright member 29, and the second cross piece 27, 28. ).

The scaffold 1 structure has mechanically coupled connecting means between the blocks 2 realized through a pair of male / female connecting members 9, 10.

The connecting members 9, 10 are realized with end connections between the upstanding members or cross-sections of the adjacent blocks 2 by inserting projections of the element ends into the mating engagement recesses of adjacent element cross sections.

The coupling locking means of each pair of connecting members 9, 10 are arranged through the holes 39, 40 arranged in the transverse direction of the connecting members 9, 10 which are prevented from escaping through the mating split pin 33. It is preferably in the form of a cross pin 32 to be.

The locking means are fixed to the module by chains in order to avoid damaging the coating in case of an accidental fall.

The automatic centering means 34 between the blocks 2 are preferably suitable for centering the blocks 2 during assembly operations.

The self-centering means 34 has at least one first part 36 engaging with the male connecting member 9 and a second truncated conical or truncated pyramidal member 37 engaging with the female connecting member 10. An intermediate member 35 is provided between each pair of connecting members 9, 10.

In particular, the first part 36 has a shape corresponding to the male connecting member 9 having a slot, and the holes 39 and 40 of the connecting members 9 and 10 into which the transverse pins 32 can be fitted. It has a hole 38 that is aligned, while the second portion 37 is tapered and extends gradually from the first portion 36.

In a preferred embodiment, the second portion 37 consists of two pairs of oppositely converging trapezoidal plates 41, 42 welded together.

The intermediate member 35 preferably has a different height for continuous coupling. This allows to control the number of initial connection points defined during the first assembly step of the two blocks 2 and only to continuously add the remaining connecting members 9, 10.

The operation of the scaffolding structure according to the invention will be apparent from the illustration and description.

In particular, the present invention can quickly and simply lay from the bottom surface and side surfaces of the dock to the scaffold end as a predetermined amount of coating is continuously placed.

Therefore, the scaffold of the present invention may make various modifications and changes to cover the concept of the present invention, and the present invention may be replaced by technically equivalents.

In practice, the materials and sizes used may vary as necessary.

Claims (21)

In the assembling method of the scaffolding structure for laying a coating on the dock of a ship for transporting liquefied natural gas, And said polygonal modules of said scaffold structure are assembled into blocks outside said dock, and then said blocks are assembled together inside said dock. The method according to claim 1, And said assembling between the blocks is in the form of a mechanical coupling between the male / female connection member pairs. The method according to claim 1 or 2, Each coupling of the male / female connection member is locked with a pin and a split pin corresponding to each other. The method according to any one of claims 1 to 3, And the blocks are assembled to each other through a series of auto centering of the pair of male and female connecting members. The method according to any one of claims 1 to 4, The block defines at least one peripheral framework facing the side surface of the dock for laying the side coating of the dock, a horizontal working surface to be lifted from the support base of the structure, and a top upper horizontal working surface. Assembled together so that the structures are first placed on the bottom surface of the dock via side longitudinal rows of a plurality of first and second opposing height regulating legs, and then face each other to be lifted back at the same time. The method of assembling the scaffolding structure, characterized in that to sequentially raise the pair of rows of legs to be placed on the bottom coating of the dock. In scaffolding structure for coating of dock of ship for transport of liquefied natural gas, Scaffolding structure having an assembled block of polygonal modules of said structure, said mechanical coupling connecting means between said blocks realized via a pair of male / female connecting members. The method according to claim 6, And locking means for coupling of each pair of coupling members. The method according to claim 6 or 7, The locking means has, for each pair of connection members, a cross pin that is inserted through the transversely aligned holes of the connecting members and prevents separation through a corresponding split pin. . The method according to any one of claims 6 to 8, The locking means is fixed to the module by a chain. The method according to any one of claims 6 to 9, Scaffolding structure with automatic centering means between said blocks suitable for centering said blocks during assembly. The method according to any one of claims 6 to 10, The automatic centering means has an intermediate member between each pair of female and male connecting members of the connecting member, the intermediate member having at least one first portion engaged with the male connecting member, and the female connecting member. And a second truncated conical member or truncated pyramid-shaped member coupled to the scaffold structure. The method according to any one of claims 6 to 11, The intermediate member has a different height for successive coupling of the pair of connecting members. The method according to any one of claims 6 to 12, And the module is an element having a transverse extension and a straight hollow polygonal portion. The method according to any one of claims 6 to 13, At least one type of the module has an intersecting piece connected to form a “U” shape with the first and second upright members, wherein the entire first diagonal member and the second diagonal member are welded to the first diagonal member and the first And two halves of the member fixed to the first diagonal member via opposing connecting plates positioned at the intersections between the second diagonals. The method according to any one of claims 6 to 14, At least one form of the module includes a triangular upright member and an intersection and a first diagonal member, and a second diagonal member suitable for connecting a corner between the upright member and the intersection to an intermediate point of the first diagonal member. Scaffolding structure, characterized in that provided. The method according to any one of claims 6 to 15, At least one type of the module includes first and second cross pieces and upstanding members connected to form a “C” shape, and first and second connecting end portions of the first cross pieces to intermediate points of the second cross pieces. Scaffolding structure provided with diagonal member. The method according to any one of claims 6 to 16, The block forms at least one side wall around the side surface of the dock for laying the side coating of the dock, a horizontal work surface lifted from the support base of the structure, and a top upper horizontal work surface. And the structure is laid on the support base via a height adjustment leg of a mutually opposite side longitudinal row of a plurality of first and second height adjustment legs. The method according to any one of claims 6 to 17, And the peripheral framework has at least one access space with respect to the working surface. The method according to any one of claims 6 to 18, The peripheral framework has a means of separation from the side surface of the dock, the scaffolding structure of which is provided with an independently insertable adjustable platform arranged at different heights. The method according to any one of claims 6 to 19, Between the leg and the support foot of the structure, a corresponding large adjustment screw, a side jack suitable for discharging the weight of the scaffold to the large screw, and integrally with the large screw, control the pressure of the foot on the coating and Scaffolding structure, characterized in that connected via a pump having a pressure gauge for high-precision adjustment. A method of assembling a scaffold structure and related and scaffolded structures described and claimed for laying a coating of a dock of a liquefied natural gas transport vessel.

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