DE7439505U - PIPE-LAYING VESSEL FOR LAYING PIPELINES IN WATERS WITH CHANGING WATER DEPTHS AND AT DIFFERENT WATER STANDINGS IN WATERDOMS AND NEAR THE COAST - Google Patents

Description

F * AlTE ¹ NT * Ä hJiW A LTE • · ·. . .

DIPL.-INQ. R. SPLANEMANN '·'o'lPL.-CHEM.DR. 67 REITZNER DIPL.-INQ. J. RICHTER MÖNCHEN HAMBURQ

HAMBURG 36, November 26th, 1974

New Wall 10 Telephone: (040) 34 00 45 Telegram address: Inventlus Hamburg

Lower file: 2o58-III-1646

Your sign: Utility model registration Ludwig Freytag, 29 Oldenburg

Pipe-laying ship for laying pipes in waters with changing Water depths and at different Water levels in tidal areas and near the coast using a floating

Ship

The invention relates to a pipe-laying ship for laying pipelines in waters with changing Water depths and at different water levels in tidal areas and near the coast, using a floating ship with a device for welding the individual pipes together and with a

Accounts: Duulidt Bank AO Hamburg, KIc no. 7/02456 ■ Potlidiickkontoi Hamburg 1301 55-206

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declceeltigen transport path on which the pipeline is on during the forward movement of the ship to the ship's stern slides on a conveyor track and is lowered from there.

Devices for laying pipelines on the seabed from a floating ship are known. Starting from a floating ship, the individual predetermined lengths are determined on the deck and bow side having pipes assembled and welded. As the ship advances, the assembled pipeline slides on rollers to the stern of the ship and is lowered from there. Since predominantly steel pipes with a concrete coating are used, must the bend of the assembled pipeline despite its resistance to certain bends be kept within certain limits to avoid kinking and deformation. It is therefore known a tension mechanism that continuously gives the pipeline an effective tension, and one to use a ramp that keeps the pipeline sliding or a guide mandrel known as a "stinger" which is pivotally connected to the ship's stern, to which Purpose to keep the pipeline to be lowered in a certain curvature.

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The aim of all known devices is to avoid kinking or excessive turning of the pipeline while it is being lowered into deep waters, and they work with them short pipes that are welded together on the pipe-laying vessel. As a result, the fresh welded pipe points can not remain on the ship for a long time for strengthening, but to achieve high laying performance with the Pipeline must be lowered immediately, with the consequence that easy damage to the pipes in the area of the Welds can occur.

The object of the invention is to create a pipe-laying ship for laying pipelines with which, the laying of a pipeline on long pipe units in bodies of water with changing water depths and with different water levels, as they occur in tidal areas • and near the coast, is possible and a ver

insert without interruption, which in turn allows one

special process for the production of the i j requires piping.

To solve this problem, a pipe-laying ship is used Laying of pipelines in waters with changing

Water depths and at different water levels, such as in tidal areas and near the coast, using a floating ship with a device for welding the individual pipes together and with a lid-like transport track on which the pipeline moves while it is moving forward the ship slides to the ship's stern on a transport path and is lowered from there, and in particular using long tube units, proposed according to the invention in the manner is designed that on the deck of the ship as a transport path for the long pipe units one each Pipe rocker that accommodates long pipe units and is provided with pipe braking devices with a rocker axle bearing, the bow side can be adjusted in height by means of hydraulic or compressed air-operated working cylinders is, and at the rear end of the pipe rocker a welding device and a clamping device for the top resting pipe end of the lowered pipeline are arranged that the hull with the stern a fixed roller block is provided, and that the stern of the hull is designed and shaped like a catamaran pontoon is provided with a lifting jack and a height-adjustable roller basket.

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The pipe rocker is designed to be tiltable by a maximum of 3 °, see above that the inclination of the pipe rocker can be adapted to the inclination of the pipeline that has already been laid, which in particular is advantageous for carrying out the welding process at the pipe connection points. the The pipe rocker is also equipped with plague clamps and adjustment clamps for transferring the long pipe units provided in the welding position and also has roller blocks for longitudinal transport the long tube units and for their rotary movement.

By means of the pipe-laying ship designed according to the invention, the stern for a perfect laying of the pipelines in the shape of a catamaran and with a Height-adjustable roller block or the stern a catamaran pontoon with the height-adjustable RoI-lenboci ;. may have, is a laying of pipelines also in morphologically very restless areas and further possible in waters with different water levels and changing water depths. Because of the use A high installation rate can be achieved for long pipe units about the length of a ship. Since the long pipe units fed to the welding station on the pipe rocker and into the required position using the pipe rocker Inclination that corresponds to the inclination of the ship

■ • AtIgen pipe end of the ready laid Pipeline corresponds to the need for on-board hoists to cope with the relatively high pipe weights. The long tube units are exclusive Subject to sliding movements · Furthermore, by means of the pipe rocker, the long pipe unit is aligned with the pipe end on the top side of the laid pipeline for the welding process. In addition, there is the one to be connected to the end of the pipe Long pipe unit in the one required for laying Inclined position so that perfect welded connections are available. With changing depths, the angle of inclination of the pipe rocker can be adapted to the required lowering inclination.

In the drawing, the object of the invention is shown for example, namely shows

1 shows a pipe-laying ship in a side view,

Fig. 2 the pipe-laying ship in a view from above and

Flg. 3 the individual phases in «laying of up to 6 pipelines Bittele de «Rohrverleger- • chiffefc.

In the Flg. 1 and 2 1st old Io is the body of the ship de "Rohrvorlegeschiffe · denotes * On the" deck 11 de "ship body" Io i "t a pipe rocker 12 is arranged, the length of which otwa corresponds to the length of the "ship" body Io, where however, there is still space left to get there the welding device and the holding device for the pipe end of the already lowered pipeline accommodate. The tubular axle bearing is indicated at 14.

The tube rocker 12 is designed as a roller conveyor and with individual roller blocks 13 provided. The rollers of the roller blocks 13 are arranged and designed so that the long tube unit LR can slide smoothly. Lateral driven rollers with axes running in the longitudinal direction of the pipe are used to rotate the long pipe units in order to bring them into the welding position bring. At the same time, it is also possible to align the long pipe units in such a way that their longitudinal weld seams assume an upper position, especially since they are

with the laid pipelines around concrete-sheathed Steel pipes.

Indicated at 15 and provided on the tube rocker 12 Braking devices are used to brake the long pipe units when they are on the pipe rocker 12 in the area the welding device indicated at 3o. These braking devices 15 can be designed as brake shoes encompassing the long tube units. But also other devices for braking a feed movement, in particular if the pipe rocker 12 is inclined Has position can be used. Adjustment clamps indicated at 2o serve to align the pipe end of the long pipe unit LR for the welding process. In addition, the pipe end of the long pipe unit LR is longitudinal and transverse for the welding process can be moved to the longitudinal direction of the pipe, so that the pipe end can be brought exactly into the welding position.

The welding device 3o is designed in a manner known per se. In the area of this welding station takes place also at the same time the insulation of the welded pipe points * At 35 welding converters are indicated.

On deck 11 of the hull Io are stern two pipe clamps 4o, 41 arranged, by means of which the Pipe end of the already laid pipe R is held for the welding process. I am more established Roller block 45, which can, however, be adapted to the inclination of the pipe rocker 12, is used to accommodate the pipe end the already laid pipeline R and beyond as a sliding surface during the lowering of the Pipeline.

At the stern of the hull Io is a catamaran pontoon 5o arranged, which can be connected to the hull Io via coupling devices 53, 54. Of the Catamaran pontoon 5o consists of two floating bodies 51, 52 which are arranged at a distance from one another and which are connected to the rear by a cross member 57. Rear the catamaran pontoon 5o has a jack 55, which has a height-adjustable roller basket 56 as a support and Receives sliding surface for the pipeline to be laid.

The hull Io is also provided on the bow side with connection means 6o for a transport pontoon 7ο, with which the long pipe units prepared onshore are transported to the laying ship (Fig. 3 to 6)

- Io -

This transport pontoon 7ο is designed with flood and bilge chambers designed so that the pipe rocker 12 in the horizontal position forms a plane with the transport surface of the transport pontoon 7ο, so that the long pipe units can slide individually onto the pipe rocker 12. For transferring the long pipe units from the transport pontoon 7ο to the pipe rocker 12 winches with cables are provided.

The laying of a pipeline by means of the pipe-laying ship designed according to the invention is shown in FIGS. 3 to 6 are shown. The transport pontoon 7o is docked with the help of Watt tugs at the laying vessel Io aft and is engaged with the coupling * direction 6o fixed. By means of winches, the individual long pipe units are rolled over rolling devices provided on the deck of the transport pontoon onto the roller conveyor of the pipe rocker 12 of the laying vessel Io related. The rocker tube 12 assumes a horizontal position (FIGS. 3 and 4). If a long pipe unit LR is arranged on the pipe rocker 12, the pipe rocker 12 pivots by a maximum of 3 °. By means of the retaining and adjusting clamps 2o and 4o, 41 are the pipe ends to be welded together in the correct "

Position for the welding process brought (Fig. 5). The weld seam is indicated at 36. After the Welding, x-raying and isolating the welding point moves the laying vessel Io and the pipe string slides with the help of the roller cage 56 of the catamaran pontoon 5o in the prepared pipe trench or on the sea bed (Fig. 6).

By means of the Sohr laying ship designed according to the invention, long pipe units are used and Connected to one another on the ship side to form pipelines. These long pipe units are created on land in such a way that initially several pipes are welded together to form so-called long pipe units and the welds are insulated. Each long pipe unit is roughly the length of the pipe-laying vessel on. However, shorter lengths can also be connected and laid to form pipe strings. Every long pipe unit created on the land side is laid horizontally a run-off track arranged transversely to the transport direction of the long pipe units, onto which the long pipe units are transferred in a rolling manner. From this drainage track, the long pipe units are transferred parallel to each other onto a floating transport surface,

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the all roller conveyor is formed. The roller conveyor of the floating transport surface can be adjusted in height around the transport surface by means of fouling directions to bring into the plane that the pipe rocker 12 of the laying vessel Io In its horizontal position occupies. The floating transport surface is connected to the hull of the laying vessel at the bow end, so that the long pipe units can be individually removed from the pipe-laying vessel 12 taken over can be. Because the landside created Long pipe units are transported in the same level, the long pipe hauls are not exposed to any bending or kinking stress. Because of the cautious Handover of the long pipe units created on the landside the floating transport surface 7o and from this to the pipe rocker 12 of the laying vessel, any damage to the insulation of the pipes in the area of the welds is avoided. Are the long tube units individually have been taken over by the pipe rocker 12 of the laying ship, then each long pipe unit by tilting the Pipe rocker 12 moved by a maximum of 3 ° using the retaining and adjusting clamps in the welding position, with the adjusting clamp 2o horizontal and vertical movements of the long tube unit on the

Pipe rocker 12 are possible. The adjusting clamp 2o can be moved on a rail track (not shown in the drawing) in the direction of the welding device 3o for the purpose of aligning the long pipe unit. In the same way as the adjusting echelle 2o can be moved horizontally and vertically, the pipe clamps 4o, 41 can also be moved or pivoted in the same way in order to simplify the alignment of the pipe ends to be welded together. The vertical movement of the adjusting clamp 2o and the pipe clamps 4o, 41 can take place by means of lifting devices not shown in the drawing.

When the catamaran pontoon 5o is integrated into the hull Io, the stern of the hull is Io Designed in the shape of a catamaran pontoon and has the lifting jack 55 with the height-adjustable roller cage 56.

The invention is not limited to the embodiment described above and shown in the drawing form. Deviations in the design of the tiltable transport path for the long pipe units on the laying vessel are just as much within the scope of the invention as a different design of the catamaran pontoon.

Protection claims -

Claims (6)

a 74 39 5o5.4 Fa. Ludwig Freytag, Oldenburg PROTECTION CLAIMS ι 1. Pipe-laying ship for laying pipelines in bodies of water with changing water depths and at different water levels such as in mudflats and near the coast, using a floating one Ship with a device »for welding the individual pipes together and with a deck-side transport track on which the pipeline slides on a transport track during the forward movement of the ship to the ship's stern and from there is lowered from, and in particular using long pipe units, characterized in that that on the deck (11) of the laying vessel (lo) as Transport track for the long pipe units (LR), one with one long pipe unit and one with braking devices (15) provided pipe rocker (12) with a rocker axle bearing (14), the bow side by means of hydraulic or compressed air operated working cylinder (19) adjustable in height 1st, and at the rear End of the pipe rocker (12) a welding device (3o) and a clamping device (4o, 41) for - 15 - the top-lying pipe end of the lowered pipe (R) are arranged that the hull (lo) is provided at the stern with a fixed roller block (45) and that the The stern of the hull (lo) is designed for a catamaran pontoon and is secured with a jack (55). ! like with a height-adjustable roller basket (56) is provided. 2. Pipe-laying ship according to claim 1, characterized in that that the tubular rocker (12) is designed to be tiltable by a maximum of 3 ° and that the rocker axle bearing (14) is arranged in the section of the tubular rocker (12) facing the stern of the hull (lo). 3. pipe-laying ship according to claim 1 and 2, characterized in that the pipe rocker (12) as a roller conveyor is formed and roller blocks (13) for the longitudinal transport of the long pipe units (LR) and for whose rotational movement has. 4. pipe-laying ship according to claim 1 to 3, characterized in that the pipe rocker (12) with retaining and adjusting clamps (2o) for transferring the individual long pipe units (LR) into the welding position is provided. 7439505 1 a 06.76 5. pipe-laying ship according to claim 1 to 4, characterized in that on the deck (11) of the hull (lo) at the rear and in front of the fixed roller block (45) a pipe clamping device (4o, 41) is arranged and that the roller block (45) according to the respective inclination of the tubular rocker (12) is designed inclinable. 6. pipe-laying ship according to claim 1 to 5, characterized in that the hull (lo) on the bow side is provided with connection means (6o) for transport pontoons (7o).