Winding wire of high-temperature-resistance electromagnetic coil and manufacturing method of winding wire

Abstract

The invention discloses a winding wire of a high-temperature-resistance electromagnetic coil and a manufacturing method of the winding wire. The winding wire comprises a copper conductor, a nickel layer is formed outside the copper conductor in an electroplating manner, an adhesive layer is arranged on the exterior of the nickel layer, a biphenyl type polyimide film wraps the adhesive layer to form a first wrapping layer, a layer of glass fibers wraps the first wrapping layer to form a second wrapping layer, and a layer of biphenyl type polyimide paint coats the second wrapping layer to form an enamel covering layer. According to the winding wire of the high-temperature-resistance electromagnetic coil, the biphenyl type polyimide film and the biphenyl type polyimide paint with the best temperature resistance are taken as an organic insulating layer with a total polyimide (PI) structure; the glass fibers are utilized as an inorganic insulating layer; therefore, by virtue of a hybrid organic and inorganic insulation structure, the high temperature resistance, high radiation resistance, high insulation property and high tensile strength of the winding wire are ensured, the bar-position driving electromagnetic coil manufactured by the winding wire still can stably work for a long term in a high temperature environment at about 320 DEG C after a forced ventilation cooling system is omitted.

Description

technical field [0001] The invention relates to the technical field of nuclear power equipment, in particular to a winding wire for manufacturing a rod position driving electromagnetic coil of a control rod driving mechanism of a nuclear power plant and a manufacturing method thereof. Background technique [0002] The rod position driving electromagnetic coil of the control rod driving mechanism of the nuclear power plant is set outside the tubular container filled with 250°C high temperature and high pressure water. Under the normal operating conditions of the nuclear power plant, the rod position driving electromagnetic coil of the control rod driving mechanism is in the energized state for a long time. After calculation And experiments have verified that when there is no external forced ventilation cooling, the temperature of the coil can only be in thermal equilibrium when it reaches 320°C. At present, the winding wires for the rod position driving electromagnetic coils ...

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Problems solved by technology

At present, the winding wires for the rod position driving electromagnetic coils of the control rod drive mechanism of nuclear power plants, the winding wires for transformer electromagnetic coils and the winding wires for motors are all in accordance with GB / T6109 series standards and GB / T7672 series standards, but due to the current nuclear power plant control rod drive The temperature resistance level of the winding wire and other electrical materials used for the rod position of the mechanism to drive the electromagnetic coil is only about 200°C, and the thickness of the insulating layer of the winding wire is 0.25mm to 0.35mm. It can be used stably for a long time in an environment with the following temperature, which cannot directly meet the requirements of the operating conditions of nuclear power plants.

Therefore, the control rod drive mechanisms of nuclear power plants need to be equipped with a huge dedicated ventilation cooling system to cool them, but this not only increases the construction cost of the nuclear power plant, but also increases the maintenance cost of the nuclear power plant, and reduces the thermal efficiency and economic benefits of the nuclear power plant

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