The construction of the bridge crane includes a bridge that moves along rails fixed above the ground, as well as a freight trolley moving along the bridge. Products can be equipped with an electric drive or manual control, have one or two beams, they can be controlled from the surface, by control or by a cabin.The construction of the bridge crane includes a bridge that moves along rails fixed above the ground, as well as a freight trolley moving along the bridge. Products can be equipped with an electric drive or manual control, have one or two beams, they can be controlled from the surface, by control or by a cabin.
In turn, cranes with 1 or 2 beams are suspended or supporting type. In the latter case, the equipment moves along rails that are stacked on reinforced concrete or steel beams. I-beams are used to move suspended analogs. Suspension devices may have 1, 2 or more spans. The bridge crane is equipped with load-lifting mechanisms of various types, which allows you to classify products into magnetic, hook, clamshell and electromagnetic.
Varieties of bridge cranes
Devices are equipped with various types of suspension. It can be rigid and flexible, in the latter case, ropes are used. In metallurgical cranes, which are used in the steel industry, the suspension of cargo is carried out by a rigid method. Allocate well cranes for stripping ingots and other types. All of them have a working device, inextricably fastened to the trolley through the shaft, vertical columns are used to move it.
Single-beam structures include I-beams. Their edges are fixed to the beams, which are located transversely, they are equipped with special running wheels. Electric or manual hoists perform the function of a trolley for lifting and moving goods. If the spans are significant, then the main beam is reinforced with trusses, they can be installed both in horizontal and vertical position.
Devices with 2 beams in the simplest version incorporate a pair of parallel beams, which are fixed at the edges to the transverse beams. In such designs, the trolley with the load moves along the rails, they are stacked along the upper belts of the main beams. If the spans and operating loads are large, which bridge of the device is made of box-beams or trusses of a trellised variety.
Overhead cranes are both universal and special metallurgical. In the latter case, the devices may be casting, filling or mixing. A wide selection of designs will allow everyone to choose the one that will best meet the requirements put forward.