Full-automatic underwater welding method

Abstract

The invention provides a full-automatic underwater welding method and equipment. The equipment comprises an air compressor (1), a gas cylinder (2), a welding camera (3), a welding test chamber (4), a water drain device (5), a hydraulically-driven automatic welding platform (6), a water surface (7), a welding analyzer (8), a welding power supply (9), a monitoring television cabinet (10), a control system cabinet (11), and a manual control box (12). A local dry underwater welding method is used for underwater surfacing and groove butt welding; during welding, the unitary pulse metal inert gas arc welding is adopted; the gas used for water drainage during the welding is also used as the welding shielding gas; before welding, the welding parameters including welding method, welding speed, swinging speed, swinging amplitude, left-right standstill time and the like are set through the manual control box (12) as required, wherein the parameters can be regulated in real time according to the actual condition; the camera system is used for performing omnibearing remote monitoring on the inside of the welding test chamber (4); and the welding analyzer (8) is used for acquiring welding electric parameters and performing statistical analysis in real time. The equipment can be used in the places where the personnel cannot reach, such as deep water area, radiant environment and the like, thereby not only realizing remote control of fully-automatic underwater welding operation, but also ensuring good formation of seams to further ensure the obtaining of high-quality underwater welding joint.

Description

technical field [0001] The invention relates to a welding method, in particular to a fully automatic underwater welding method capable of realizing fully automatic welding in an underwater environment and monitoring the welding process and welding quality. Background technique [0002] With the development of the nuclear power industry, the related maintenance work of nuclear power plants has also been put on the agenda. There are many radioactive containers in nuclear power plants, such as reactor pressure vessels, evaporators, pressurizers, condensers, spent fuel pools, refueling pools, feed water pools, etc. Due to nuclear radiation stress and other effects, radioactive containers are prone to corrosion cracks and surface abrasions that seriously threaten the safe operation of the power station. Welding repairs such as leak patch welding, crack opening groove repair welding, and abrasion and corrosion surface overlay welding are required. In order to reduce the impact of...

AI Technical Summary

Problems solved by technology

Submersible welders are directly exposed to the radiation environment due to manual welding, and some containers have high internal water temperature and extremely harsh working environment. The working time of a welder usually does not exceed 1 hour. In addition, personnel are required to monitor the radiation dose of submersible welders on the water surface, etc. , so that the cost of manpower input is high

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