Basically gantry hoists are used to move lengthy and bulky objects and typically taken advantage of at industrial warehouses of large area or open construction sites. Gantry hoist construction is in demand in hangars and workshops of enterprises engaged in production of concrete products, freight yards. In addition, the cranes are widely used to perform a variety of cargo handling, lifting and installation works on container platforms of railway junctions. One of the most mature and seasoned overhead cranes and gantry hoist UK manufacturers is Granada Material Handling, producing the equipment at industrial scales for both local and abroad markets.
A true to type gantry crane consists of a single-girder or double-girder bridge (without brackets and one or two consoles), two metal poles and moving hoist or trolley. The construction, depending on the modification of the crane, may also include a variety of lifting devices: grab, magnetic disk, and numerous specialised units and elements.
Gantry crane is controlled from the operator’s cab or from the ground through the keypad station. You can control the crane remotely via radio control console. In standard climatic design gantry cranes can be operated in the range of -20 to + 40 ° C; the low temperature constructions operate within the range from -40 to + 40°C.
Gantry cranes are classified according to several parameters, including – according to the configuration of the bridge and its purpose.
Depending on the design features of the bridge, distinguished are overhead traveling cranes and double-girder constructions:
- Single girder gantry crane envisages a flyby of the beam tube design, which is based on the L-shaped support. Due to the limited carrying capacity, most models do not exceed 12.5 tons, overhead traveling cranes are used mainly for lifting general cargo in commercial and industrial warehouses.
- Double-girder cranes have greater lifting capacity, resulting in a much more widely used in various fields. In these species trolley rails are mounted on top of the bridge girders.
Gantries electrical intended for various loading and unloading of any complexity and for different operating modes, including normal hook, grab, magnetic, container.
Drive control of a gantry crane is implemented on the basis of modern frequency converters providing smooth, stepless control of all crane movement for precise positioning and security of cargo and vehicles.
Metal structure consists of a gantry crane bridge (without brackets, with one or two consoles) and two poles. The bridge can have a single-beam or double-girder structure. Gantry crane moves on a rail crane rails on four undercarriage. Each of the trucks is driving. Frame undercarriage has a welded box-like structure.
The location of drive trucks has enough traction to the drive wheels of the crane rail in any mode of loading and regardless of the location of the trolley with respect to the bridge. Fixing the crane is carried out with anti-theft devices such as tick-borne in accordance with the modern safety requirements. Undercarriage is equipped with protective arcs which minimise the chance of damaging to minimum. The wheels for transportation trolley wheels are reinforced to avoid accidents.