CN2381861Y

CN2381861Y - Pipeline laying apparatus at shallow seabed

Info

Publication number: CN2381861Y
Application number: CN 99239300
Authority: CN
Inventors: 谭家华; 顾敏童; 高捷; 邓德衡; 王纲筛; 何炎平
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 1999-08-17
Filing date: 1999-08-17
Publication date: 2000-06-07
Anticipated expiration: 2009-08-17

Abstract

The utility model relates to a pipeline laying apparatus at shallow seabed. A pipeline laying boat and a bracket boat are connected by a wire rope; the tail of the pipeline laying boat has a fixed bracket; a sloping guide way is arranged on a central line of the pipeline laying boat; a small traction trolley is arranged on the sloping guide way; the wire rope rounds a guide pulley to cause the small traction trolley and a tension pipeline to be connected by a winch; two lifting brackets are arranged on the bracket boat. The utility model can keep the shape of pipelines in vertical plane and horizontal plane, and can ensure that the internal stress of pipes does not exceed allowable stress when the pipes are laid; the pipeline laying apparatus can also reduce tension and decrease requirements to tension devices. The utility model is especially suitable for laying thin-wall steel pipes with major diameter in shallow water.

Description

Shallow sea undersea pipe-laying device

The utility model relates to a kind of shallow sea undersea pipe-laying device, and apparatus for work and lifting frame structure thereof when being a kind of marine pipe-laying belong to job that requires special skills mode and machinery field in the Piping work of ocean.

In the prior art, conventional laying barge laying method is the most frequently used installation method of submerged pipeline, and pipe is supplied with pipelaying barge with carrying barge with the form of single or certain-length, and deck crane hangs onto storage pipe support on the pipelaying barge with pipe.When pipe laying, hoist is transported to one with pipe by the storage pipe support and send pipe support automatically, thereby delivers to the collimation platform, carries out the non-destructive testing of welding pipe and weld seam.During pipelaying work, a positioning of anchor on sea bed, was drawn anchor hawser the pipe support rack of ship again and was tied to the end of first pipe.Take in the anchor hawser of each anchor of middle part on demand and emit the stern anchor hawser, pipelaying barge just moves forward.Pipe was supported by slideway on the barge and pipe support rack before being put on the sea bed.

Carriage on the pipe laying barge helps to support pipe and forms a S type curve when pipe laying, and towing tension after producing along the stretcher that production line is placed, the curvature when dropping to sea bed with confinement tube.Carriage and tension force have suitable influence to the work capacity of pipe laying barge, many times are exactly because the tension force that pipe laying barge provided is not enough, or owing to carriage falls short of, thereby the pipe section of dangling lengthening, steel pipe stress increases, and makes steel pipe generation flexing and gauffer, is damaged.Especially in shallow water, laying the large diameter thin wall pipeline, adopt conventional laying barge operation, need very long fixed or movable formula carriage, and long carriage makes pipe laying barge and carriage all restive under severe sea condition, even pipelaying work can't be carried out.

The purpose of this utility model is to manufacture and design a kind of undersea pipe-laying device of new structure, make it in the process of tubing, vertical and the horizontal curvature of pipeline is controlled in the acceptable scope, required tension force in the time of reducing pipeline internal stress and pipe laying, reduction is to the requirement of tension equipment, and is particularly suitable for the laying of large diameter thin wall steel pipe in shallow water.

For realizing such purpose, the paving device that the utility model adopts comprises pipe laying barge and carriage ship, and conventional pipe laying barge has been done improvement.The winch that on pipe laying barge, is equipped with inclined guide rails, analog bracket, trailer wagon and tensioning pipeline to use.Analog bracket is fixed on the afterbody of pipe laying barge, supports the steel pipe of laying to form S type curve, and inclined guide rails is arranged on supporting structure on the center line of pipe laying barge, and its angle of inclination is decided according to the design needs; One trailer wagon is arranged on inclined guide rails, be connected with wirerope between the steel pipe of trailer wagon and laying, the wirerope of using with a tensioning pipeline is walked around a leading block trailer wagon and winch is linked up, and is used for producing a tension force of laying pipe; With eight location wireropes, also has two traction pipe laying barges carrying cable of usefulness forward on the pipe laying barge.Capital equipment on the carriage ship is two shears, by regulate shears up and down and rotation angle, improve the stress situation of pipeline when laying.Shears mainly is made up of lifting bar, crane sheave block, shears fixed end and Movable bracket, wherein the crane sheave block Movable bracket can be sling or with its sinking to the seabed, but relative movement between Movable bracket and the shears fixed end.Carriage four location wireropes peculiar to vessel are located, and the carriage ship is connected wirerope with pipe laying barge with two and couples together.

The pipelaying work method basic principle that the utility model is realized is: rely on tensioning to provide the pipe laying tension force with trailer wagon, wirerope and tensioning pipeline with winch, the while also relies on this cover system to cooperate with shears on the carriage ship, picks up pipe, pipe abandon; Rely on the lifting of shears on the carriage ship, the form of can regulate pipeline is to adapt to the different depth of waters; Rely on shears to give the carriage ship, rely on the buoyancy of ship to be overcome the pipe section weight transfer; Rely on the shears lateral flow power that pipeline is suffered to pass to ship, by the restoring moment balance of ship; When pipe laying barge moved forward, the carriage ship moved forward together.

For understanding the technical solution of the utility model better, describe in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model overall structure schematic representation.

Among the figure, be connected with wirerope 14 between pipe laying barge 1 and the carriage ship 6, inclined guide rails 2 is arranged on the center line of pipe laying barge 1, one trailer wagon 8 is arranged on inclined guide rails 2, be connected with wirerope 7 between trailer wagon 8 and the steel pipe of laying 4, a tensioning pipeline is arranged with winch 10 on pipe laying barge 1, walk around a leading block by the tensioning pipeline with wirerope 9 trailer wagon 8 and tensioning pipeline are linked up with winch 10, the tension force when being used for producing a laying pipe; Analog bracket 3 is fixed on the afterbody of pin pipe ship 1, supports the steel pipe of laying 4 to form S type curve; Two shears 5 are arranged on carriage ship 6, by regulate shears 5 up and down and rotation angle, improve the stress situation of pipeline when laying.

Fig. 2 is the utility model overall structure schematic top plan view.

Among the figure as seen, being connected wirerope 14 with two between pipe laying barge 1 and the carriage ship 6 links to each other, wirerope 12 location, eight location of pipe laying barge 1 usefulness, also has two traction pipe laying barges 1 carrying cable 11 of usefulness forward simultaneously, wirerope 13 location, four location of carriage ship 6 usefulness, the steel pipe 4 of laying is positioned on the center line of pipe laying barge 1.

Fig. 3 is the structural representation of shears on the carriage ship of the present utility model.

Shown in the figure, shears 5 on carriage ship 6 has a lifting bar 15, can turn an angle around self center, and the shears fixed end 17 of the bottom of lifting bar 15 has a semi-circular recesses, wherein can let live moving carriage 18, on lifting bar 15, be equipped with a crane sheave block 16.The crane sheave block Movable bracket 18 can be sling or with its sinking to the seabed, with the distortion of controlling plumbing fixtures with carry out pipe abandon, pick up the pipe operation, and can regulate at any time, satisfy the job requirements of the different depth of waters.Between Movable bracket 18 and the shears fixed end 17 relative movement is arranged, Movable bracket 18 is at all rotatable several angle of vertical surface, horizontal plane, to adapt to the gradient of tubing in vertical surface and the bending in horizontal plane.

The carriage ship 6 that the utility model adopts, effect is obvious, can significantly reduce the stress of tube bending section, the lifting controlling plumbing fixtures form of two shears 5 on the carriage ship 6, rely on shears 5 to give hull with the weight transfer of pipeline 4, with the buoyant equilibrium of hull, than conventional pipe laying barge, its control measure are clear and definite, easy to operate, having avoided conventional pipe laying barge that very long section of a pipe is arranged is overhang, has correspondingly reduced pipe stress greatly, has guaranteed the form of vertical plane interior conduit.When pipeline is subjected to flowing the masterpiece time spent, part stream power passes to the hull of carriage ship 6 by shears 5, hull is under the heeling moment effect, angle of wing drop, the heeling moment balance that restoring moment that produces and stream power produce, this process needn't any control just can autobalance, kept the form of steel pipe in horizontal plane.

When normal pipelaying work, can connect wirerope 14 and come the distance between bracket ship 6 and the pipe laying barge 1 and the lifting of shears 5 by regulating, control the distortion of pipe.To the different depth of water, carriage ship 6 and pipe laying barge 1 position and shears height atlas when setting up the different depth of water are implemented operation, at the stress of each job state the one roughly control of the order of magnitude can both be arranged to pipe like this, make it be no more than yield stress, satisfy the requirement of Security.

When pipe laying and pipe abandon, utilize

pipe laying barge

1 and 6 synergy of carriage ship, just do not need other auxiliary ships.During pipe abandon, crane sheave block 16 and wirerope 7 coordinations in the two cover shears 5 that carriage ship 6 front end and back end all have just can be put into the seabed at leisure with Movable bracket 18 and pipeline 4.

When picking up the pipe operation, earlier lifting bar 15 is aimed at the Movable bracket 18 in seabed, and be transferred to proper height, the correct simultaneously position of determining pipe laying barge 1, by crane sheave block 16 and wirerope 7 Movable bracket 18 and pipeline 4 are sling then, Movable bracket 18 is put into the semi-circular recesses of shears fixed end 17, the pipeline the other end is dragged the afterbody chucking of pipe laying barge 1, just finished and picked up the pipe operation.

Tensioning wirerope 9 links to each other with winch 10 with tensioning pipeline on the pipe laying barge 1, tension force when producing tubing, because the cooperation of carriage ship 6 is arranged, need not huge tension force, the tension force of Chan Shenging can satisfy usage requirement in this way, and needn't resemble the tension device that need produce huge tension force the conventional pipe laying barge.

The utility model is cheap, has solved the unmanageable problem of long carriage, is particularly suitable for shallow water and lays the large diameter thin wall pipeline.

Claims

1, a kind of shallow sea undersea pipe-laying device, comprise pipe laying barge and carriage ship, it is characterized in that analog bracket 3 being arranged at the afterbody of pipe laying barge 1, inclined guide rails 2 is arranged on the center line of pipe laying barge 1, one trailer wagon 8 is arranged on inclined guide rails 2, be connected with wirerope 7 between trailer wagon 8 and the steel pipe of laying 4, the wirerope 9 that the tensioning pipeline is used is walked around a leading block trailer wagon 8 and winch 10 is linked up, two shears 5 are arranged on the carriage ship 6, pipe laying barge 1 and carriage ship 6 be all with the wirerope location, is connected with wirerope 14 between pipe laying barge 1 and the carriage ship 6.

2, a kind of as the said shallow sea of claim 1 undersea pipe-laying device, it is characterized in that said shears 5 has a lifting bar 15 that can rotate around self center, the shears fixed end 17 of its underpart has a semi-circular recesses, wherein can let live moving carriage 18, between Movable bracket 18 and the shears fixed end 17 relative movement is arranged, on lifting bar 15, be equipped with crane sheave block 16.