In this study, the body is composed of several welding holes to form a steel tube plate layered protective device which is easy to install and precise to construct,It is attached to the outside of the steel tube plate and has a way layer to prevent corrosion,In the steel tube plate layered protection device to protect this kind of layer,The protective cover can cover the host (1) of the mode layer (5),The main engine (1) is long enough to provide wings (2) at both ends which are combined with the steel tube plate (6),A plurality of connecting holes (3) and a bolt are formed on the wing (2) and connected with the steel tube plate (6),A plurality of holes (3) are formed between the above-mentioned signing holes (3), which are composed of a steel tube plate (6) provided by underwater electric welding and a welding hole (4) provided by the main machine (1) with temporary adhesion, and the protective device is covered by a strong light plate.
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