Crane electromagnetic for hoisting high temperature circular pipe blank

Abstract

The present invention discloses crane electromagnet, and is especially one kind of crane electromagnet for hoisting high temperature circular pipe blank. The crane electromagnet is a U-shaped one including several exciting coils and corresponding iron cores, and each exciting coil and its corresponding iron core comprise one small U-shaped electromagnet. The iron core acting as the magnetic yoke of the small electromagnet has two ends connected to two supporting boards with vertical bracing boards, non-magnetic conducting radiation resisting board and flexible magnetic poles in the bottom. The flexible magnetic pole has a fixed upper end and freely pendulous lower end and is stretched beyond the crane electromagnet in the length not smaller than the radius of maximum hoisted pipe blank. All the small U-shaped electromagnets have their like polarity supporting boards connected through connecting boards. The present invention has reliable operation, light weight and other features.

Description

technical field [0001] The invention relates to a lifting electromagnet, in particular to a lifting electromagnet for lifting a high-temperature circular tube billet. Background technique [0002] With the development of continuous casting technology in our country, continuous casting round billets have been widely used to produce seamless steel pipes, but the lifting efficiency of continuous casting round billets has always been low, and many enterprises still use the backward method of hoisting with steel wire ropes , some companies use lifting electromagnets to lift steel pipes, and the production efficiency has been improved to a certain extent. However, because this type of lifting electromagnets has not been able to solve the problem of the small contact surface between the magnetic poles and the round tube billet, it can only rely on increasing the number of ampere turns. To meet the lifting requirements, the volume and weight of the electromagnet are large, and the a...

AI Technical Summary

Problems solved by technology

[0002] With the development of continuous casting technology in our country, continuous casting round billets have been widely used to produce seamless steel pipes, but the lifting efficiency of continuous casting round billets has always been low, and many enterprises still use the backward method of hoisting with steel wire ropes , some companies use lifting electromagnets to lift steel pipes, and the production efficiency has been improved to a certain extent. However, because this type of lifting electromagnets has not been able to solve the problem of the small contact surface between the magnetic poles and the round tube billet, it can only rely on increasing the number of ampere turns. To meet the lifting requirements, the volume and weight of the electromagnet are large, and the absorption-to-weight ratio is very small, especially the lifting electromagnet for lifting high-temperature round tube billets. At present, the lifting electromagnet for lifting high-temperature round tube billets Iron is to add a little heat insulation measures on the basis of the aforementioned lifting electromagnet, but the effect is very limited. At the same time, the number of ampere turns of the electromagnet needs to be further increased to compensate for the loss caused by the rapid rise of the coil temperature when lifting the high-temperature round tube billet. Suction and lifting capacity, its energy consumption is very high, and because of the small contact surface between the magnetic pole and the round tube billet, not only the efficiency of the lifting electromagnet is low, but sometimes there will be an unsafe phenomenon that the high temperature round tube billet will fall, these factors restrict The application of lifting electromagnets for lifting high-temperature round tubes is generally considered to be unsuitable for lifting high-temperature round tubes.

Images