Hoisting electromagnet for elevating steel pipe

Abstract

The invention relates to a jack up electromagnet particularly for hoisting the steel tubes. The U shape magnetic comprises one or more actuating coil and corresponding iron core, each actuating coil and the corresponding iron core forming into a small U shape electromagnet, with the iron core being the magnetic yoke with both ends fixed to two supporting plates, whose bottom fixed with several flexible magnets, whose top end being fixed, bottom dripping loosely, flexible magnet pole sticking out the said support face, with length equal or bigger than hoisting max. steel tube radius, each small U shape electromagnet co-magnetic poles linked through connection plates. It can hoist the steel tube safely and reliably, with simple structure, low energy consumption and light in weight.

Description

technical field [0001] The invention relates to a lifting electromagnet, in particular to a lifting electromagnet for hoisting steel pipes. Background technique [0002] Steel pipe production enterprises generally use steel wire ropes to hoist steel pipes, whether it is a single steel pipe or multiple steel pipes, and the work efficiency is low; occasionally, lifting electromagnets are used for hoisting, and the magnetic poles of the lifting electromagnets used There are generally two structures, one is a lifting electromagnet with movable magnetic poles, and the other is a lifting electromagnet without movable magnetic poles. Lifting electromagnets without movable magnetic poles have two structures: flat magnetic poles and multiple arc teeth. Lifting electromagnets with flat magnetic poles are unreliable for lifting and transporting steel pipes, and are prone to falling of the suspended steel pipes; The lifting electromagnet with multiple arc teeth on the magnetic pole sur...

AI Technical Summary

Problems solved by technology

[0002] Steel pipe production enterprises generally use steel wire ropes to hoist steel pipes, whether it is a single steel pipe or multiple steel pipes, and the work efficiency is low; occasionally, lifting electromagnets are used for hoisting, and the magnetic poles of the lifting electromagnets used There are generally two structures, one is a lifting electromagnet with movable magnetic poles, and the other is a lifting electromagnet without movable magnetic poles.

Lifting electromagnets without movable magnetic poles have two structures: flat magnetic poles and multiple arc teeth. Lifting electromagnets with flat magnetic poles are unreliable for lifting and transporting steel pipes, and are prone to falling of the suspended steel pipes; The lifting electromagnet with multiple arc teeth on the magnetic pole surface can only better envelope the steel pipe of a certain specification, thereby increasing the contact between the steel pipe and the magnetic pole, which is beneficial to the lifting electromagnet to lift the steel pipe, but for other specifications However, the steel pipe cannot be enveloped. This kind of steel pipe and the magnetic pole can only be in one line contact. number, consumes a lot of energy

When the electromagnet with movable magnetic poles is working, the movable magnetic poles increase the line contact between the steel pipe and the magnetic poles to a certain extent, which is also beneficial to the lifting electromagnet to lift the steel pipe. However, due to the relatively complicated structure of the movable magnetic poles, the electromagnet’s Weight, sometimes some movable magnetic poles will be stuck and cannot move up and down, resulting in unreliable work, and this lifting electromagnet also requires a large number of ampere turns and consumes a lot of energy

Therefore, it is generally believed that lifting electromagnets are not suitable for lifting steel pipes.

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