CN1127182A

CN1127182A - Pipe water butt welding method and equipment

Info

Publication number: CN1127182A
Application number: CN 95117625
Authority: CN
Inventors: 杨元林; 叶云虎; 金胜昌
Original assignee: ZHEJIANG OCEAN ENGINEERING CORP
Current assignee: ZHEJIANG OCEAN ENGINEERING CORP
Priority date: 1995-10-19
Filing date: 1995-10-19
Publication date: 1996-07-24

Abstract

The invented method and equipment are used for water surface butt-welding between pipes or other containers and specially suitable for laying the underwater pipelines. The splice welding boat is composed of two floating bodies composed of mutually isolated sealed cabins and surge bunkers and a main body fixing between the two floating bodies and being composed of mutually isolated operating cabin and surge bunker and water bands installed on two sides of the main body. The butt welding, fault detection and corrosion prevention treatment are conducted in the operating cabin. There are locating piles for preventing the rocking and drifting of the boat caused by wind, wares and water flow velocity when welding, so the welding quality is ensured and the difficulity of construction of submarine pipeline and short construction site is solved.

Description

Pipe water butt welding method and equipment

The present invention relates to a kind of method of the water surface counterpart welding between pipeline and pipeline enclosure or other container and equipment of use of being used for, pipe water butt welding method and equipment that suitable especially submarine pipeline is laid.

Submarine pipeline is generally all very long, in pipeline laying construction, must be earlier that successively a pipeline weldering is in aggregates by connecting, and then lay under water, pipeline welding is if carry out in factory, and welding back oversize being not easy to of pipeline transported, if can weld at the construction field (site), can reduce the trouble of transportation, there is so big welding place the bonding part but differ in the job site, and this brings very big inconvenience just for the pipeline underwater construction.So long pipeline will swim on the water surface in construction simultaneously, and other ship can not be navigated by water, and influence the water transportation transportation.

The object of the present invention is to provide and a kind ofly make the method that pipeline or container can counterpart welding on the water surface and use the method devices needed, can guarantee that pipeline connects the difficulty of minimizing transportation trouble in aggregates and construction site deficiency at the construction field (site), reduce floating on water surface length, do not influence the water transportation transportation.

The present invention is achieved in that by the operational window of mutual isolation, regulate main body that the cabin constitutes is fixed on sealed compartment by mutual isolation, regulate in the middle of two buoyancy aids that the cabin constitutes, and the welding ship of forming at main body two arranged outside waterstops.In the water surface splicing of welding ship enterprising line pipe road: 1. the two ends that at first will need two pipeline sections that weld float on the water surface after with blind plate sealing, the cabin of respectively regulating that a certain amount of water is poured on the hull evenly sinks hull again, when pipeline to be welded swims in the water surface, when absorbing water the draft less than hull waterstop two ends simultaneously, two pipelines to be welded can be sent into the centre position of operational window on the hull.2. hull is regulated water in the cabin and is extracted out the hull drinking water is reduced, contact and sealing with the pipeline cylindrical, prescind the blind plate on two pipe ends to be welded then up to waterstop, with power-equipment with two pipe ends slowly to holding together.3. guide pile just can carry out the welding of pipeline counterpart at the water surface under inserting at the buoyancy aid two ends respectively, can detect a flaw preservative treatment etc. on the welding ship after the welding.4. pipeline welding is poured water in hull after good again hull is evenly sunk, and the pipeline that will weld is removed from hull and bubbled through the water column.

Fig. 1. weld the structural representation of ship for the present invention.

Fig. 2. for the A of Fig. 1 to view.

Fig. 3. be user mode figure of the present invention.

Fig. 4. be the vertical view of Fig. 3.

Below in conjunction with accompanying drawing embodiments of the invention are further described.

Buoyancy aid (1) is tubular or casing shape, be separated into three independently sealed compartments (also can be a plurality of sealed compartments), two ends are to being much of the adjusting cabin (2) of opening, be used to increase or reduce the draft that the storage of water is regulated hull, guarantee that hull has certain buoyancy, also be welded with the climbing of annular on the both ends of the surface.

Main body (8) is welded into three independently sealed compartments by steel plate and shaped steel, the centre is operational window (4), both sides are for regulating cabin (3) and at two cofferdams of regulating between the cabin (3) (7), also place the U-shaped waterstop of being made by flexible material (6) on the outward flange of two cofferdams (7) being much of two of opening.Cofferdam (7) can prevent because of waterstop (6) poorly sealed, and the water that bleeds from the sealing mouth enters operational window (4).

To make good main body (8), laterally vertically be weldingly fixed on integrant welding ship on the middle symmetric position of two vertical parallel buoyancy aids (1).

Can comprise the following steps: in the water surface counterpart welding in the enterprising line pipe of welding ship road

(1). the two ends that at first will need two pipeline sections that weld float on the water surface after with blind plate sealing, with immersible pump a certain amount of water is poured in adjusting cabin (2) on welding each buoyancy aid of ship (1), the main body (8), (3) again, hull is evenly sunk, when pipeline to be welded swims in the water surface, absorb water draft simultaneously less than welding ship waterstop (6) two ends, at this moment pipeline to be welded can be sent into the centre position of main body (8) operational window (4) from the two ends of welding ship, and make the spacing that leaves 70～80cm between ends of tubes.

(2). the water that will weld in ship adjusting cabin (2), (3) is extracted out, the hull drinking water is reduced, contact and sealing with the pipeline cylindrical up to waterstop (6), prescind the blind plate on two pipe ends to be welded then, slowly draw two pipe ends over to one's side alignment with chain block or other power-equipment again.

(3). guide pile (5) is fixed the welding ship under the climbing interpolation at buoyancy aid (1) two ends respectively, and operating personnel just can carry out water surface counterpart welding in operational window (4), after the welding also can weld on the ship detect a flaw, preservative treatment etc.

(4). pouring water in hull after pipeline welding is good evenly sinks hull again, and the pipeline that will weld removes from hull and bubble through the water column, and repeats to weld with said method to make each pipeline section connect into whole pipeline just to can be used for laying under water again.

The present invention compared with prior art, the method for this pipe water butt welding is simple, only needs One simple device welding ship, and welding ship compact conformation, volume is little, easily makes, and low cost of manufacture again can Solving practical problems. The buoyancy of how much regulating the welding ship of water reaches in the adjusting cabin by pouring into or extracting out Seal and disengaging with contacting of docking pipeline to waterstop, also can regulate level or the inclination of hull simultaneously Angle. Impact because of stormy waves, flow velocity when adopting again guide pile to be used to prevent from welding makes hull rock, float Moving affects welding quality. The method be because directly operating at the water surface, make simple to operate safe, laborsaving, A lot of intermediate conversion links have been reduced. Take full advantage of buoyancy of water and alleviated labour intensity, simultaneously also big Reduced greatly operating expenses, solved the not enough and transportation difficulty in construction site, can grasp at the water surface because of him again Do, while just can weld the laying that sinks under the water of the good pipeline of welding, the minimizing pipeline is at the water surface On floating length, do not affect water transportation transportation.

Claims

1. pipe water butt welding method, it is characterized in that comprising the following steps (1). the two ends that at first will need two pipeline sections that weld float on the water surface after with blind plate sealing, the cabin of respectively regulating that a certain amount of water is poured on the hull evenly sinks hull again, when pipeline to be welded swims in the water surface, when absorbing water the draft less than hull waterstop two ends simultaneously, two pipelines to be welded can be sent into the centre position of operational window on the hull; (2). hull is regulated water in the cabin extracts out the hull drinking water is reduced, contact and sealing with the pipeline cylindrical, prescind the blind plate on two pipe ends to be welded then up to waterstop, with power-equipment with two pipe ends slowly to holding together; (3). guide pile just can carry out the welding of pipeline counterpart at the water surface under inserting at the buoyancy aid two ends respectively, can detect a flaw preservative treatment on the welding ship after the welding; (4). pouring water in hull after pipeline welding is good evenly sinks hull again, and the pipeline that will weld is removed from hull and bubbled through the water column.

2. method according to claim 1 is characterized in that and pipeline to be welded can be sent into the centre position of main body (8) operational window (4) from the two ends of welding ship, and makes the spacing that leaves 70～80cm between ends of tubes.

3. device therefor that uses the described method of claim 1, it is characterized in that by the operational window of mutual isolation, regulate main body that the cabin constitutes and be fixed on sealed compartment by mutual isolation, regulate in the middle of two buoyancy aids that the cabin constitutes, and the welding ship of forming at main body two arranged outside waterstops.

4. equipment according to claim 3, it is characterized in that buoyancy aid (1) is tubular or casing shape, be separated into three independently sealed compartment or a plurality of sealed compartments, two ends are to being much of the adjusting cabin (2) of opening, also be welded with the climbing of annular on the both ends of the surface, main body (8) is welded into three independently sealed compartments by steel plate and shaped steel, the centre is operational window (4), both sides are for regulating cabin (3) and the cofferdams (7) between two adjusting cabins (3) to being much of two of opening, also place the U-shaped waterstop of making by flexible material (6) on the outward flange of two cofferdams (7), laterally vertically be weldingly fixed on integrant welding ship on the middle symmetric position of two vertical parallel buoyancy aids (1) making good main body (8).