Cavity plate non-magnetic material filling eddy current blocking process of explosion-proof electric appliance

Abstract

The invention provides a cavity plate non-magnetic material filling eddy current blocking process of an explosion-proof electric appliance. The process comprises steps of cutting an eddy current blocking groove between two adjacent holes of a cabinet body wall plate through which an electric conductor passes in the explosion-proof cabinet body; filling a non-magnetic metal material in the eddy current blocking groove; riveting and compacting a filling body part filled with the non-magnetic metal material, and assisting in welding; carrying out water pressure inspection of the grooved, filled,riveted and welded eddy current blocking groove according to the explosive-proof product requirement. The process is advantaged in that the eddy current blocking groove is formed in a magnetic circuitso that the eddy current can be effectively blocked and reduced, the principle is applied to a high-current high-explosion cabinet with the current of more than 800A for implementation, the effect ofreducing eddy current heating is achieved, the eddy current blocking groove is filled with the non-magnetic material, the non-magnetic filling material and main body steels are combined in a high-strength mode through an effective technological means, the requirement for the explosion-proof performance of the explosion-proof cabinet body is met, and lastly, the eddy current heating effect generated by an explosion-proof electric appliance product at the position where a large-current electric conductor penetrates through a box wall of the cabinet body is effectively reduced.

Description

technical field [0001] The invention relates to a mine explosion-proof high-voltage vacuum power distribution device used in places with explosion hazards, such as coal mines. By using non-magnetic materials to fill the eddy current barrier structure and the implementation process, the conductors can be effectively reduced in the AC high current state. The phenomenon of eddy current heating generated when passing through the wall plate of the iron flameproof box. Background technique [0002] There is a physical phenomenon called eddy current. When an alternating current passes through a conductor, an alternating electric field will be generated around it. According to the principle of electromagnetic induction, an alternating magnetic field will be generated in the ferrous magnetic material around it. The changing magnetic field induces an alternating electromotive force inside the material, which creates eddy currents inside the ferrous material, which heats the material. ...

AI Technical Summary

Problems solved by technology

The present invention takes figure 2 The structure diagram of a typical explosion-proof high-voltage vacuum switchgear is given as an example. In order to solve the problem of the thermal effect caused by the induced current generated on the rear wall plate 1 of the resistance reduction cabinet, that is, the eddy current, the non-magnetic of the flameproof electrical cavity plate is stated. The specific implementation process of the material filling eddy current barrier structure and process plan, the process includes the following steps:

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