The overhead crane is the hoisting equipment which was installed on the upper rails in the workshop, warehouse and material yards. Because of its both sides located in the concrete support leg or steel structure, it looks like a bridge. The overhead crane travels along the rails to hoist the materials, not be influenced by the objects on the ground. Based on the above mentioned factors, it is a hoisting machinery which owns widest applicable scope and large quantity.


In China, the overhead crane includes the general purpose overhead crane, simple girder structure overhead crane, metallurgy-exclusive overhead crane.
1, The general purpose overhead crane consists of the single- girder and double-girder. The basic structure is trolley, crane traveling mechanism, steel structure. The trolley contains hoisting mechanism, trolley traveling mechanism, trolley frame.
2, The simple girder structure overhead crane is also called beam crane whose structure is similar to the general purpose overhead crane. Its lifting capacity, span, traveling and hoisting speed is very small and low. The main beam is usually the simple cross section beam like the I-steel or other steel plate. The trolley is hand pulling block or electric block. The trolley travels along the lower flange of the I-steel. And the whole crane can travel along the upper rail or lower rail. Generally speaking, this kind of crane is called the underslung traveling overhead crane.
3, The metallurgy exclusive overhead crane can accomplish the special workmanship operation in the steel-making process. Except some specific mechanism or facilities on the trolleys, its whole structure is similar to the general purpose overhead crane. Its main characteristics are high usage frequency, bad working environment and high working level.
It contains five types: cast house overhead crane, socking pit overhead crane, ingot stripping overhead crane, charging overhead crane, forge overhead crane.