Composite milling material increasing and decreasing type in-situ repairing device and method for deepwater pipeline

An in-situ repair technology for deep-water pipelines, applied in the direction of additive processing, welding equipment, laser welding equipment, etc., can solve the problems of reducing mechanical properties, affecting printing quality, hole cracks, etc., to improve repair quality, good mechanical properties, The effect of less cracks

Pending Publication Date: 2019-12-06
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0004] However, underwater metal additive manufacturing, on the one hand, has the problem of "water cooling", that is, the molten channel produced by additive manufacturing will directly contact seawater to cool rapidly. This is an uncontrollable process, which is easy to affect the printing quality and cause holes and cracks. Defects reduce the mechanical properties; on the other hand, there are problems with difficult operation

Method used

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  • Composite milling material increasing and decreasing type in-situ repairing device and method for deepwater pipeline
  • Composite milling material increasing and decreasing type in-situ repairing device and method for deepwater pipeline
  • Composite milling material increasing and decreasing type in-situ repairing device and method for deepwater pipeline

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Embodiment

[0045] An in-situ repair equipment for deep-water pipeline compound milling with addition and subtraction of materials, including a repair cabin 1, an equipment cabin 4, a tool magazine 16, a local control system 18, a six-axis robot 22, an additive repair system, a subtractive processing system, and a monitoring system;

[0046] Such as figure 1 and figure 2 Shown are the structural schematic diagram and the cross-sectional schematic diagram of the cabin in the repairing equipment, respectively.

[0047] Both sides of the repair cabin are provided with a replaceable hatch 3 and a sealed hatch 2, which are used to load the pipeline to be repaired into the repair cabin and ensure the airtightness of the cabin; the top of the repair cabin is provided with a protective gas pipe interface 5 for Through the gas cylinder equipped with the water surface, high-pressure protective gas is provided to the cabin to remove the liquid in the cabin; the bottom of the repair cabin is equipp...

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Abstract

The invention discloses a composite milling material increasing and decreasing type in-situ repairing device for a deepwater pipeline. The device comprises a repair cabin, an equipment cabin, a cutterstorage, a local control system, a six-axis robot, a material increase repair system, a material decrease handling system and a monitoring system. According to the device, an underwater high-pressuredry method is utilized to carry out underwater metal additive manufacturing, so that repaired parts have fewer holes, fewer cracks, high density, high strength and good mechanical property. The plasma melting deposition and laser melting deposition combined material reduction manufacturing are adopted and meet repair work under various conditions; the problem of interface combination of a first layer of plasma melting deposition is solved in a laser pre-deposition mode, and the repair of dissimilar materials is realized; after the repair is finished, an anti-corrosion layer is subjected to laser melting deposition, thereby greatly improving the quality of the repaired parts.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing and repairing of deep-water metal parts, in particular to an in-situ repairing device and method for deep-water pipeline compound milling adding and subtracting materials. Background technique [0002] With the continuous development of natural resources, offshore oil and natural gas have become one of the main energy sources for human beings today. Offshore oil and gas pipelines are the first choice for its transportation. In 1865, Pennsylvania, the United States built the world's first oil pipeline. After World War II, the United States began to build large-scale long-distance offshore oil and gas pipelines. Up to now, the submarine oil and gas pipelines laid in my country have exceeded 6000km . Due to the continuous erosion of seawater pipelines, the repair of deep-sea oil and gas pipelines is of great significance. With the emergence and development of additive manufacturing te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/342B23P23/04B23P6/00B33Y30/00B33Y10/00
CPCB23K26/348B23K26/342B23K26/0093B33Y30/00B33Y10/00B23K2101/06
Inventor 杨永强翁昌威秦文韬李阳宋长辉
Owner SOUTH CHINA UNIV OF TECH
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