Preparation method of nickel-plated copper mica winding wire

Abstract

The invention relates to a preparation method of a nickel-plated copper mica winding wire, which comprises the following steps of: a, coating a nickel-plated layer on the outer surface of a copper conductive core to form a nickel-copper wire; b, performing correction processing on the nickel-copper wire; c, preheating the corrected nickel-copper wire at 60-80 DEG C, coating the nickel-plated layerwith an organic silicon resin layer A, and baking the coated organic silicon resin layer A at 90-110 DEG C; f, winding a corona-resistant mica layer on the coated organic silicon resin layer A; e, wrapping the corona-resistant mica layer with a 360-branch alkali-free boron-free glass fiber layer, then soaking the 360-branch alkali-free boron-free glass fiber layer in organic silicon resin, and carrying out pre-curing treatment at the temperature of 110-130 DEG C; and f, performing baking and drying at the temperature of 150-160 DEG C for 10-15 min, dipping the whole wire in organic silicon resin, performing staged temperature control baking in a staged manner, and performing curing treatment. A polyimide enameled wire is replaced by nickel-plated copper to serve as a conductive wire core,and a mica layer reinforcing structure is added.

Description

technical field [0001] The invention relates to the technical field of nuclear power equipment, in particular to a preparation method of a nickel-plated copper mica winding wire. Background technique [0002] Nuclear energy is clean, safe, and efficient energy. It is currently the only energy nuclear energy that has achieved industrial applications and can replace fossil fuels on a large scale. It is an effective way to reduce environmental pollution and achieve coordinated development of the economy and the ecological environment. In nuclear power plants, the control rod drive mechanism (CRDM) is the key equipment of the nuclear island and plays a vital role in the safe operation of the nuclear power plant. Coil winding wire is a supporting material in CRDM coil components. It is generally made of polyimide enameled wire wrapped with polyimide film and glass filament. The reliable working environment temperature is below 220°C. [0003] Chinese patent authorization announc...

AI Technical Summary

Problems solved by technology

However, with the development of technology, the requirements for coil operating temperature and radiation resistance are getting higher and higher. The conventional polyimide enameled wire is wrapped with polyimide film and glass filaments. Due to the thin thickness of the wire insulation, the composite insulation The difference in layer structure distribution directly affects the overall mechanical and electrical performance of the wire. The phenomenon of high-voltage breakdown and low withstand voltage in water is common, which cannot be applied to the needs of some nuclear power projects.

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