High-temperature-resistant electric control hoisting electro permanent magnet

Abstract

The invention discloses a high-temperature-resistant electric control hoisting electro permanent magnet which comprises chains connected with hoisting equipment, lifting lugs arranged at the bottom ends of the chains, and an electro permanent magnet body fixedly connected to the bottom ends of the lifting lugs, wherein the electro permanent magnet body is of a sealed integrated structure consisting of a top plate, side plates, an end plate, an inner magnetic plate and a heat insulation plate; an iron core is arranged in the middle in the electro permanent magnet body; main excitation coils sleeve the outside of the iron core; a plurality of groups of magnetic steel are respectively arranged in the middle of the iron core; demagnetization coils respectively sleeve the outside of the multiple groups of magnetic steel; an outer magnetic pole is arranged at the bottom end outside the electro permanent magnet body; the top plate, the side plates, the outer magnetic pole, the inner magnetic plate, the iron core and the multiple groups of magnetic steel form a magnetic loop. According to the high-temperature-resistant electric control hoisting electro permanent magnet, current meeting different demands is generated by using electric control energy; during excitation, the high direct current is supplied; during demagnetization, the intermediate-frequency alternating current is supplied to the demagnetization coils; and therefore, extremely good and convenient control can be realized.

Description

technical field [0001] The invention relates to the field of equipment for lifting high-temperature billets used in industrial production, in particular to a high-temperature-resistant electric-controlled lifting permanent magnet. Background technique [0002] At present, the lifting electromagnet is a special electromagnet that uses the attracted object as the armature. It uses the magnetic field generated after the coil is energized to absorb the attracted object. It must always be energized during the lifting process. If the cable is broken , the power failure magnetic protection system cannot supply power to the electromagnet, and there will be an accident that the electromagnet loses its magnetic field and the attracted object falls. When lifting high-temperature and ultra-high-temperature billets, the conventional electromagnet often has insufficient suction and the billet falls off. The main reason is that the electromagnet itself generates heat, and the heat cann...

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Problems solved by technology

[0002] At present, the lifting electromagnet is a special electromagnet that uses the attracted object as the armature. It uses the magnetic field generated after the coil is energized to absorb the attracted object. It must always be energized during the lifting process. If the cable is broken , the power failure protection system cannot supply power to the electromagnet, and there will be accidents where the electromagnet loses its magnetic field and the attracted object falls

When lifting high-temperature and ultra-high-temperature billets, the conventional electromagnet often has insufficient suction and the billet falls off. The main reason is that the electromagnet itself generates heat, and the heat cannot be dissipated. Conventional products, for products at 300°C and above, are limited by the Curie point of permanent magnet steel and cannot be used at high temperatures

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