A method for dynamic load test of pipe-laying system of pipe-laying vessel

Abstract

The invention discloses a method for a dynamic load test of a pipe laying system of a pipe laying vessel. The method comprises the following steps of step I, docking a stern of the pipe laying vessel at a dock, mounting a first fixed pulley at the stern, arranging a truck crane at a shore of the dock, lifting a hoisting arm and laying a hoisting hook on the hoisting arm down above the first fixed pulley; step II, placing a sea pipe on lower tracks of tensioners, keeping the sea pipe in a horizontal state, enabling one end of the sea pipe to be connected with a first steel wire rope on a winch, enabling the other end of the sea pipe to be sequentially connected with a second steel wire rope, a dynamometer and third steel wire ropes and enabling the other ends of the third steel wire ropes to penetrate through the first fixed pulley to be fixed on the hoisting hook on the truck crane; and step III, enabling the position of the hoisting arm to be unchanged, starting the tensioners and the winch, adjusting a hoisting rope of the hoisting hook to enable the hoisting hook to lift, and reading a readout on the dynamometer to complete the dynamic load test. The method disclosed by the invention is directly performed at the dock, the whole vessel is simple to moor, so that the testing cost can be greatly saved, and the testing time can be greatly shortened.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a method for dynamic load test of a pipe-laying system of a pipe-laying ship. Background technique [0002] As the core part of the pipe-laying ship, the pipe-laying system includes winches, tensioners, etc. The pipe-laying system of the pipe-laying ship generally needs to carry out load tests (including dynamic load tests and static load tests) during the commissioning of the shipyard and the subsequent use stage. , in order to ensure the pipe laying capacity of the pipe laying system and the safety of pipe laying. The dynamic load test of the pipe-laying system is generally carried out at sea, and the large tugboat provides the external pulling force required for the test. This method of using a large tugboat to carry out the dynamic load test is not only expensive, but also needs to ensure that the pipe-laying ship is outside the large tugboat. There is no horizontal drag when ...

AI Technical Summary

Problems solved by technology

The dynamic load test of the pipe laying system is generally carried out at sea, and the external tension required for the test is provided by a large tugboat. This method of using a large tugboat for the dynamic load test is not only costly, but also needs to ensure that the pipelaying vessel is not affected by the large tugboat. There is no horizontal drag when pulling, so there will be problems such as relatively difficult mooring of pipe-laying ships and difficult tests

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