A device and method for surface repair of underwater steel structures in marine engineering
A surface repair and marine engineering technology, applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, etc., can solve the problems of large structure, fast corrosion rate, under-corrosion level of seawater resistance, and achieve simple device structure, improve work efficiency, Strong corrosion resistance effect
Active Publication Date: 2021-04-06
NANTONG UNIVERSITY
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Problems solved by technology
[0002] As the exploitation of offshore oil gradually develops from offshore to deep sea, the structure of offshore drilling and production platforms is becoming larger and larger, the technology is more and more complex, and the manufacturing cost is getting higher and higher.
At present, low-alloy high-strength steels such as E32 and E36 are generally used to manufacture offshore platforms at home and abroad, but their seawater resistance is under-corrosion. Seawater system, diurnal and seasonal temperature changes, and marine bio-erosion cause the corrosion rate of underwater steel parts to be faster. As time goes by, the defects on the steel surface will become larger and larger, resulting in a reduction in the service life of offshore platforms.
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[0023] The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment
[0024] The device of the present invention includes a hydraulic lifting system 18, a laser system 41, a drainage system 32, a powder spraying system 6, a workbench 2, and a steel structure 1.
[0025] The hydraulic lifting system is mainly composed of an outer cylinder body 19, an outer piston rod 20, an inner piston rod 23, a main oil pump 15, an auxiliary oil pump 13, a main reversing valve 16, an auxiliary reversing valve 14, an oil tank 12 and a fixed plate 27. The cylinder body 19 is fixed above the workbench 2 through the fixing plate 27. The outer cylinder body 19 is provided with an external oil inlet port 22 and a quick oil outlet port 17 respectively connected with the main reversing valve 16 and the oil tank 12. The main reversing valve 16 Connected with the main oil pump 15, the two ends of the outer piston rod 20 are sealed and ...
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Abstract
The invention relates to a device and method for repairing the surface of an underwater steel structure in marine engineering. The device includes a hydraulic lifting system, a laser system, a drainage system, a powder spraying system, a workbench, and an underwater steel structure. The workbench is placed on the underwater steel structure Above, the hydraulic lifting system and powder spraying system are placed on the workbench. The hydraulic lifting system is equipped with a main oil pump to control the outer piston rod for high-speed lifting movement, and an auxiliary oil pump to control the inner piston rod for low-speed lifting movement. The lower end of the inner piston rod Connected with the load-bearing plate, the laser system is fixed above the load-bearing plate, and the drainage system is fixed below the load-bearing plate. The charge-coupled element installed in the laser system is used to detect the damage of the underwater steel structure surface, and the laser is used to repair the underwater steel structure. Laser cladding repair on the damaged surface can realize real-time detection of damage to the surface of the underwater steel structure in marine engineering, and perform fixed-point and precise repairs online in real time, greatly improving the corrosion resistance of the steel structure and prolonging the service life of the underwater steel structure .
Description
technical field [0001] The invention relates to a device and a method for repairing the surface of an underwater steel structure in marine engineering, in particular to a device and a method for performing laser cladding repair on the damaged surface of an underwater steel part by utilizing a confined space. Background technique [0002] As the exploitation of offshore oil gradually develops from offshore to deep sea, the structure of offshore drilling and production platforms is becoming larger and larger, the technology is more and more complex, and the manufacturing cost is getting higher and higher. At present, low-alloy high-strength steels such as E32 and E36 are generally used to manufacture offshore platforms at home and abroad, but their seawater resistance is under-corrosion. Seawater system, diurnal and seasonal temperature changes, and marine bio-erosion cause the corrosion rate of underwater steel parts to be faster. As time goes by, the defects on the steel sur...
Claims
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IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 张华郝德胜钱双庆
Owner NANTONG UNIVERSITY