Electric control permanent magnet hanger

Abstract

The invention relates to magnet metal, in particular to an electric control permanent magnet hanger. The electric control permanent magnet hanger comprises magnet exciting coils, an iron core and hangers of permanent magnets and is characterized in that side magnetic plates are arranged on two sides of the iron core; the magnet exciting coils and the permanent magnets are arranged between the side magnetic plates and the iron core; short circuit magnetic conduction plates are arranged on the side magnetic plates, the magnet exciting coils and the iron core; elastic bodies are arranged between the two side magnetic plates and the short circuit magnetic conduction plates; working surfaces for absorbing and emptying material are arranged at the lower parts of the side magnetic plates, the magnet exciting coils and the permanent magnets, wherein the short circuit magnetic conduction plates are driven by the magnet exciting coils and the elastic bodies to ensure that a magnetic circuit is opened, and the permanent magnets, the magnetic poles thereof and absorbed objects form a closed suction magnetic circuit; and the short circuit magnetic conduction plates are connected with the magnetic poles by overcoming elastic force under the magnetic field effect of the magnet exciting coils and the permanent magnets, and the permanent magnets, the magnetic poles and the short circuit magnetic conduction plates form a closed emptying magnetic circuit. The electric control permanent magnet hanger ensures that permanent magnet blocks are always operated on a linear recovery zone, improves the suction weight ratio and has obvious energy-saving advantage.

Description

technical field [0001] The invention relates to magnetic metals, and particularly refers to an electric-controlled permanent magnet lifting device. Background technique [0002] The lifting of magnetic metal usually adopts the following three forms: a, mechanical spreader; b, electromagnetic spreader; c, permanent magnet spreader. In order to facilitate the use and improve efficiency, the latter two forms are generally adopted. Among them, the electromagnetic hoist has high energy consumption, the electronic control system is complex, and there are many unsafe hidden dangers at the fault points. Once the power of the hoist is lost, safety accidents will occur; There will be safety accidents due to power failure, but it is not fast enough to use, the synchronization of multiple cranes is poor, it is not convenient for centralized control, the mechanism is relatively complicated, and mechanical failures are prone to occur. The electronically controlled permanent magnet spread...

AI Technical Summary

Problems solved by technology

However, it is very difficult to make the electronically controlled permanent magnet not show magnetism to the outside, and it is very difficult to remove the material conveniently. The existing electronically controlled permanent magnet spreader generally adopts the following two ways to remove the material: one is to use a coil to generate a strong magnetic field to make the permanent magnet block Demagnetization, the second is to use the motor drive mechanism to achieve internal short circuit (change the magnetic circuit). The former is easy to cause the magnetic force to drop when absorbing materials, and the safety and reliability of lifting are not high. The latter has a complex and bloated mechanism and a small absorption-to-weight ratio

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