The classification of Gantry Cranes
The classification of Gantry Cranes and their various uses
First, according to the main beam structure classification
Single girder gantry crane structure is simple, easy to manufacture and install, The main girder of the main girder is the box structure, the overall stiffness is weaker. Single-girder gantry crane door leg has L-type and C-type two forms. L-type manufacturing easy to install, the force is good, their quality is small, but the lifting of goods through the legs
Of the space is relatively small. C-shaped legs made of inclined or curved shape, the purpose is to have a larger horizontal space, so that the goods smoothly through the feet.
The double girder gantry crane has the advantages of strong bearing capacity, large span, good overall stability and many varieties
The weight of the crane, single girder gantry crane compared to bigger, the cost is higher. According to the main girder structure is different, can be divided into Box girder and truss are two kinds of structures
Second, according to the use of forms of classification
- General gantry crane
This type of crane and the use of box-type frame structure, the most widely used. Can carry a variety of pieces of goods and scattered
Shaped materials, from the weight of 100 tons in the following, the span of 4 to 39 meters. General gantry crane with grapple work level is higher.
General gantry crane mainly refers to the hook, grab, electromagnetic, hoist gantry cranes, but also including half-gantry crane.
Mainly used for lifting and opening and closing gates, but also for installation operations. From the weight of 80-500 tons, the span is small, as 8-16 m; lifting speed is low, 1-5 m / min. Although this crane is not often lifting, but once the use of work is very heavy, it is necessary to properly improve the work level.
Used for container terminals. A trailer carries a quay container from a ship unloading container to the yard or rear
, By the container gantry crane stacking or direct loading away, can speed up the container carrying bridge or other crane turnover. Stackable high 3 to 4 layers, 6 rows wide container yard, generally with the tire type, but also useful rail type. Container gantry crane compared with the container straddle, its span and mast height on both sides are large. In order to meet the transport needs of the port terminal, the crane’s work level is higher. The lifting speed of 8 to 10 m / min; span according to the need to determine the number of container rows, the maximum is about 60 meters corresponding to 20 feet, 30 feet, 40 feet long container weight is about 20 tons, 25 tons And 30 tons.