Gantry Crane Concept and Classification-Dongqi Gantry Crane Professional Design

 

Gantry crane design: gantry crane concept

The Horizontal bridge is disposed on two legs which constitute a gantry crane.

This gantry crane is working by traveling rails on the ground, mainly used in open-air storage yard, docks, power plants, ports and railway stations and other places for cargo handling and installation operations.

Gantry crane hoisting mechanism, trolley traveling mechanism and bridge construction, are basically same with bridge crane. Because of long span, gantry crane are usually used by respective driven way to prevent the crane producing skewed running and increasing the resistance, and even accidents.

Gantry crane trolley is running on a bridge, and a lifting trolley is just like a boom-type cranes. Legs on both sides of the bridge are generally rigid legs; when span more than 30 meters, generally on one side, it is the rigid leg, while the other side is flexible leg connected through a ball joint and the bridge, the mast become statically indeterminate system under external loads to avoid outside thrust caused additional stress, it can also compensate bridge vertical temperature deformation gantry cranes wind area, to prevent falling or tipping over the line in the strong wind, and equipped with wind measurement instrument and operation interlock mechanism crane rail clamp.

Both ends of the bridge can be no cantilever; it can be also at one end or both ends with the cantilever, in order to expand the scope of the necessary working. Semi-gantry crane at one end there is a leg, the other end of the outrigger, run directly on a high bench.

Single girder gantry crane

Double girder gantry crane

Semi-gantry crane

Gantry crane design:gantry crane classification

Ordinary gantry cranes: This crane is the most versatile, it can carry a variety of items and bulk materials, the weight of below 100 tons, a span from 4 to 35 meters. gantry crane with grab has higher working class.

Station gantry cranes: this crane is mainly used for lifting, opening and closing the shutter, but also used for installation. Lifting capacity from 80 to 500 tons, the smaller span from 8 to 16 meters; lower lifting speed from 1 to 5 m / min. This lifting crane, though not often used, but once it working, it is frequent and heavy used, so the working class should be higher.

Shipbuilding gantry cranes: the crane is used for berth assembled hull, standing with two lifting trolley: one with two main hook, running on a bridge flange track; another has a primary hook and an auxiliary hook in running on the bottom flange of the rail bridge, in order to flip and lifting large hull blocks. Weight is generally from 100 to 1500 tons; span of 185 meters; lifting speed from 2 to 15 m / min, and from 0.1 to 0.5 m / min JOG speed.

Container gantry cranes: the crane is used for container terminal. After the trailer carrying container wharf bridge transport container unloaded from the ship to the yard or rear, it will be stacked up directly loading or transported by the container gantry crane, which can speed up the container carrier bridge crane or other turnover. It can be stacked 3 to 4 layers high, and 6 rows of container yard wide, general use tire model, it also has a rail model. Compared with the container gantry crane container straddle carrier, its height and span both sides of the door frame are larger. In order to meet the transport needs of ports, this crane has a higher working class. Lifting speed from 8 to 10 m / min; span will be according to the number of rows to cross to decide, up to about 60 meters corresponding to 20 feet from the weight of 30 feet, 40 feet long containers were about 20 tons, 25 tons and 30 tonnes.

Gantry Crane Concept and Classification-Dongqi Gantry Crane Professional Design