Device for installation of support columns self-elevating floating platform

 

(57) Abstract:

The invention is intended for use in the field of hydraulic structures erected on the sea shelf, and can be used for installation of support columns self-elevating floating platform. In the device for mounting the supporting pillars of self-elevating floating platform supporting metal structure made in the form of two shafts pivotally mounted in the mounting brackets portal on the sides of its aperture and provided with supporting abutments in contact with the roof of the portal, and eyebolts are installed for slings. Polyspastny blocks are mounted on the tips of arrows and focus on opening a portal and cargo pendant is made in the form of a beam. The use of the invention allows for this form of metal to increase the capacity of the device while reducing the cost of its operation. 1 C.p. f-crystals, 3 ill.

The invention relates to the field of hydraulic structures used offshore, and can be used for installation of support columns self-elevating floating platform (SPP).

A device for installation of support columns SPP is made in the form of a crane installed on will absorb part of the support columns and puts them in the doorway portals SPP, where they are welded together with the already mounted previously.

A disadvantage of the known device lies in its complexity and that it occupies a significant place on the deck of the CAF, except where it must be placed a large number of technological equipment.

The design complexity of the known device is due to the fact that it was a crane - very significant lifting tool.

A device for installation of support columns SPP is made in the form of a vertical rotary beams installed in a welded mounting brackets on the portal SPP his side, and bearing on the upper part of the horizontal derrick with a counterweight on one end and cargo suspension on the other. Cargo pendant is connected by a rope with a lifting mechanism. The rotation of the vertical beam is provided by a separate mechanism of the rotation.

This known device, the prototype presented in the pictures (see "journal of Ocean Industry, vol 15, 1980, April, p. 12, SPP "Interocean II").

A disadvantage of the known device the prototype lies in the complexity of its design, because in fact it is also a crane that does not only changing mechanism eversion, rotation device, are present.

In addition, this device has limited capacity, is designed for only one section of the support columns, and may not be used for lifting the entire column, for example, when the underwater installation of the last.

When attempting to enhance the device to ensure that lifting all columns from under water metal device prototype and load from it to the portal CAF increase to values at which it becomes impossible to place and secure the device on the SPP portal or on its deck.

The technical result of the invention is to simplify the design of the device, increasing its capacity and reducing operating costs.

This is achieved in the device for mounting the supporting pillars of self-elevating floating platform with portals, equipped with mounting brackets, containing the supporting metal structure with polyspastny blocks and cargo suspension associated with mounting brackets portal, the fact that the supporting metal structure made in the form of two shafts pivotally mounted in the mounting brackets portal on the sides of its aperture and provided with ofany on the tips of arrows and oriented above the opening of the portal, and cargo pendant is made in the form of a beam.

In addition, arrows device provided with additional support by the toe.

The invention is illustrated by drawings, where

- Fig. 1 presents a General view of the device on one of the portals with astroplane and raised toward the opening of the portal column, top view;

- Fig. 2 - section a-a of Fig.1;

- Fig. 3 - the node B of Fig. 2 on a larger scale, on which the dash-line arrow shown in an unfolded and supported by additional anchor the heel position, in which it SUSTEREN.

Self-elevating floating platform 1 has a winch with 2 lifting ropes 3, 4 portals, a lifting mechanism 5 and the supporting column 6.

Device for mounting contains arrows 7, pivotally mounted on the axis 8 in the mounting brackets 9, with polyspastny 10 and side 11 blocks, anchor abutments core 12 and an additional 13 and 14 eyebolts are installed, the hanger 15 with ropes 16 and 17, additional lines 18, the pins 19 and bypass the blocks 20.

The mounting brackets 9 are welded on the roof of the portal 4 on either side of its doorway, arrows 7, except that they fixed axis 8 in the mounting brackets 9, supported on the roof of the portal 4 its main anchor abutments 12. In this proposed above the opening of the portal 4. While the heel 12 perform the role of the second fulcrum of the lever, which is the arrow 7. The load on the bolt 7 from the supporting column 6 is applied through polyspastny blocks 10 and the first support arm axis is 8.

Hoisting ropes 3 winches 2 through the by-pass blocks 20 on the deck of the platform 1 and the blocks 11 on the shafts 7 zapasovany on polyspastny blocks 10 and blocks the suspension 15. The suspension 15 worn lines 16 connected to lines 17.

The eyebolts are installed 14 arrows 7 hung additional lines 18.

As hoisting winches 2 in this device can be used in any similar capacity winch, in particular, and regular anchor-mooring winches platform 1. And as bypass blocks 20, which provides the direction of the ropes 3 arrows 7, can be used as a regular rolsi anchor-mooring winches. The supporting column 6, moored at the side of the platform in a vertical position, is connected with the suspension 15 using straps 16 and 17, protoplanets (not shown) and hangs on the pulley ropes 3 winches 2 in a vertical position.

The establishment of the supporting column 6 into the opening of the portal 4 is performed in the following order.

When working winches 2 podjela straps 18, attached to the eyebolts are installed 14 of the arrows 7. Additional lines 18 are connected with the supporting column 6, after which the lines 16 and 17 praslavlyayte, and the supporting column 6 is placed on the additional means of straps 18 to ensure perestroyka support pillars 6. When perestroyka lines 17 are detached from the supporting columns 6 and straps 16, and the latter are connected with the supporting column 6.

Then the supporting column 6 is hung by means of straps 16. When this operation praslavlyayte and removed from Obukhov 14 shafts 7 and disconnected from the supporting column 6 additional lines 18.

Further work winches 2 at the rise of the supporting column 6 is lifted by means of straps 16 to the level of regular lifting mechanism 5 and is part of their racks in mesh with the gears of a lifting mechanism 5, on which it is raised to its extreme upper transport position.

To ensure that the lifting elements of the device for mounting (suspension 15, ropes 3, arrows 7) are dismantled. The suspension 15 and the rope 3 can be removed with additional lifting means is usually a small payload. Arrows 7, due to their relatively greater mass than the suspension 15, and dimensions should be removed loaded lifting it can reach the shafts 7 and disassemble them or when on the platform 1 there is no space to accommodate dismantled arrows 7, they lay in the opposite opening of the portal 4 sides so that polyspastny units 10 do not interfere with the passage of the supporting column 6 up.

In the tilted position of the boom 7 rest on the roof of the portal 4 their additional support abutments 13, preventing them fall back.

For stability in this tilted position of the shafts 7 are fixed by pins 19, members of the holes on the mounting brackets 9.

The advantage of these units for installation in comparison with the prototype is to simplify its design, which ensured due to the fact that the device is not used, the rotation mechanism or the mechanism of change of departure or rotation device, which are present in the prototype, as well as lifting mechanisms used regular anchor-mooring winches platform 1.

Installation of two shafts 7 on both sides of the doorway portal 4 allows you to reduce operational costs: if it is impossible they should be removed in the process of establishment of the supporting column 6, which is carried out on the high seas, adopted by the design ensures the release of the opening then the and operation to dismantle the shafts 7 can be carried out after the return of the platform 1 at the completion of the plant-Builder, where cranes are present and where the arrows 7 shoot directly to the pier.

Execution of the suspension 15 in the form of the bar helps to ensure the vertical direction of the pulley between the blocks 20 on the shafts 7 and suspension blocks 15, which reduces the load on all elements of the device for mounting and reduces its intensity.

Introduction to the design of the device Obukhov 14 and additional straps 18 also reduces its intensity, as due to the operation perestroyka decreases the height of the arrows 7. Without operation perestroyka to bring the supporting column 6 to the lifting mechanism 5, it was necessary to increase the height of the lifting of the suspension 15, thus the height of the arrows 7.

Declared lifting device allows you to mount the supporting column 6 as a whole, at that time, as in the prototype they are mounted on the parts. This fact also reduces operating costs.

1. Device for installation of support columns self-elevating floating platform made with portals, equipped with mounting brackets, containing the supporting metal structure with polyspastny blocks and cargo suspension associated with mounting brackets portal, characterized in that the carrier meta what about the sides of his opening and provided with supporting abutments, in contact with the roof of the portal, and eyebolts are installed for slings, with polyspastny blocks are mounted on the tips of arrows and focus on opening a portal and cargo pendant is made in the form of a beam.

2. Device for installation of support columns self-elevating floating platform under item 1, characterized in that the boom is equipped with an additional support toe.

 

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3 cl 1 ex

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