Local dry welding device and method for corner area of underwater facility

The invention provides an underwater facility corner area local dry method welding device and method, and belongs to the technical field of underwater welding, the underwater facility corner area local dry method welding device comprises an upper shell, a lower shell and a watertight welding device, the upper shell is slidably connected with the lower shell, and the watertight welding device is fixed to the upper shell; a closed welding space is formed between the lower shell and the wall face of the corner area of the underwater facility. According to the underwater local dry method welding method, welding of corners and nearby areas can be achieved, and the problems that in the prior art, underwater local dry method welding has welding dead areas, and underwater local dry method welding cannot be conducted on the corners and the nearby areas are solved. 本发明提供了一种水下设施边角区域局部干法焊接装置及方法，属于水下焊接技术领域，包括上壳体、下壳体和水密焊接装置，所述上壳体与下壳体滑动连接，所述水密焊接装置固定在上壳体上，所述下壳体与水下设施边角区域壁面间形成密闭焊接空间。本发明可实现对边角及附近区域的焊接，解决了现有技术中水下局部干法焊接存在焊接死区，无法针