Air-cooling induction coil applicable to high temperature environment

Abstract

The invention discloses an air-cooling induction coil applicable to high temperature environment. The air-cooling induction coil comprises conductive rings and insulating rings alternatively stacked, wherein the conductive rings have a plurality of disconnected parts, a guide pillar is arranged at the disconnected part and used for connecting the conductive ring with the next one via the disconnected parts, and thus a current is formed into a spiral closed loop; the conductive ring are provided with a plurality of small holes, and the small holes and the rings are synchronous in shape and both take the shape of sector rings; the conductive current is mainly distributed on the inner sides of the rings, along with variation of current frequency, the thickness of a skin layer changes, and the size of the small holes is adjusted according to the current frequency; the coil is fixedly installed in a cylindrical container with high strength and a magnetic shielding function; when in use, cooling air flows in from the hole at the bottom of the induction coil, and flows out from the hole in the top of the induction coil. The coil has good induction heating performance and structural strength, so that the induction coil does not deform when being used for a long time under the high temperature condition, and use of a water-cooling structure and potential safety hazards caused by the use of the water-cooling structure are avoided.

Description

technical field [0001] The invention belongs to the field of induction heating and relates to an air-cooled induction coil suitable for high-temperature environments. Background technique [0002] Electromagnetic induction heating uses Faraday's electromagnetic induction phenomenon, that is, the alternating current generates an induced current in the conductor, thereby causing the conductor to heat up. Due to the characteristics of fast heating speed, high efficiency, non-contact and pollution-free, and convenient automatic control, induction heating has been widely used in metallurgy, forging, heat treatment technology and other fields. In the induction heating process, the core component mainly involved is the electromagnetic induction coil. Due to special conditions, the induction coil sometimes needs to withstand harsh high-temperature environments during the working process. For example, in the electromagnetic tapping technology, the induction coil is placed at the bot...

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Problems solved by technology

[0003] When the existing induction coil works in a high temperature environment for a long time, the coil has poor high temperature resistance and will be oxidized and its strength will be significantly reduced, which cannot meet the actual needs of induction heating. For example, the softening temperature of copper is 400-600 ° C, which exceeds this temperature range When the coil is softened and deformed, the service life is greatly reduced

At present, water-cooling is mainly used for cooling. Although the water-cooling effect is better, there are safety hazards in some special high-temperature environments, and water-cooling structures cannot be used.

However, when forced cooling is carried out by passing compressed gas inside the air-core coil, the cooling effect is poor and cannot meet the actual use requirements.

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