Corrosion reinforcement and protection method for gis through-wall busbar shell

Abstract

This application discloses a corrosion reinforcement and protection method for GIS through-the-wall busbar shells, cleaning the rust around the leak point, polishing the corroded area of ​​the shell, and forming an area to be repaired; Apply adhesive to the repaired steel plate; stick the corresponding steel plate to the area to be repaired, and complete the repair after drying; set the protective sleeve on the outside of the shell corresponding to the repaired area, and the inner wall of the protective sleeve and the outer wall of the shell An annular cavity is formed between them; the axial ends of the annular cavity are filled with fireproof mud; through adhesive reinforcement and installation of protective sleeves, it can solve the corrosion defects of the in-service GIS equipment through-the-wall busbar housing without power failure , The repair and protection process technology has a short construction period, a high degree of shell reinforcement, and the installed protective casing can effectively eliminate corrosion hazards, and has a fireproof function, which has a good application prospect.

Description

technical field [0001] The application relates to a method for reinforcing and protecting against corrosion of a GIS through-wall bus bar housing. Background technique [0002] Gas insulated metal-enclosed switchgear (gas insulated switchgear, GIS) has been widely used in 110kV and above power grids. The branch bus through the wall is an important part of GIS, which plays the role of collecting, distributing and transmitting electric energy, and completes the indoor and outdoor part of the GIS bus. The role of functional connection, in the early installation of the through-wall branch busbar, because the shell protection and other requirements were not considered, there was no special protection for the wall-through area. Generally, reserved holes were used, and the through-wall busbar was directly built in the subsequent installation. The method of building in the concrete wall is used for equipment installation. [0003] For shells made of steel (carbon steel and stainles...

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Problems solved by technology

[0003] For shells made of steel (carbon steel and stainless steel), the above installation structure can meet the operating requirements and will not rust; but for shells made of aluminum alloy, due to the alkaline environment formed by the concrete pore fluid, metal aluminum will occur. Electrochemical reaction will lead to corrosion. In severe cases, it will cause corrosion and perforation of the shell, resulting in air leakage, which becomes a safety hazard that threatens the operation of GIS; It has been a long time, and if such defects are not dealt with in a timely and effective manner, they will become a major hidden danger affecting the security of the power grid.

[0004] The inventor found that the general way to deal with such equipment with hidden dangers of air leakage defects is to dismantle the GIS equipment after power failure, and replace the corroded shell parts

Although this method can eliminate potential safety hazards, on the one hand, this method requires a huge investment in equipment component replacement; This type of equipment needs to replace the shell to eliminate gaps; for the protection of the through-wall busbar, the existing method is basically to use rubber or felt paper for covering treatment, which lacks the necessary fire resistance, waterproof, anti-corrosion, and sealing functions

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