Gantry crane refers to a range of
vertical lifting and carrying heavy loads of horizontal multi-action
lifting machinery. Also known as cable car. The
main features of terrains are: its driving cab and crane cab combined,
is evolved by the crawler crane (crawler), will track and walking part
of the running gear bracket into the chassis has a tire to overcome disadvantage of crawler crane (crawler crane) track shoes on pavement damage, belonging to material handling machinery. Single girder gantry crane lifting
equipment to do some work is characterized by intermittent exercise,
namely a working cycle reclaimer, ship appropriate
mechanism to transfer, unloading and other movements are working
alternately,
development and use of cranes on the market more widely. Gantry crane manufacturers because they
are not leg slings and hoists with often some accident, driving speeds
are more cranes (crawler) fast; job stability, lifting large can
be hoist walking within a specific range, but must ensure that road
grading solid tire pressure to meet the requirements, hanging above the
ground shall not exceed 50CM; ban with a load of walking long distances.
To ensure the safety of operations, the current domestic basically prohibit the outriggers are not hoisting operations.
Santo gantry crane multi-use box type and truss structure, the most widely used. You can carry a variety of bulk materials into items and, from the weight of 100 tons, a span of 4 to 39 meters. Grab common with the work of a higher level gantry crane. Common gantry crane mainly refers hook, grab, electromagnetic, hoist
gantry crane, also includes semi gantry crane .
Bridge divided into single and double-girder, single girder generally 10t or less span is relatively small. 10t
double girder can be more, and even some large traffic can be done from
the weight of hundreds of tons, the span can be made relatively large. Orbit bridge is usually installed on the rail beam, bearing rail rail mounting bracket on the plant or from the vertical column.Gantry
crane rail mounting on the ground, on both sides of the main beam with
vertical legs have driven device leg stand upright on the track.
Electric gantry crane is a variation of the bridge crane, gantry crane known. Mainly used for outdoor yard, yard goods, bulk cargo loading and unloading operations. Its
metal structure shaped like a door frame, carrying the main beam
install two feet down, you can walk directly to the track on the ground,
both ends of the main beam may have overhanging cantilever. Gantry crane with a high utilization of space, large operating range,
wide adaptation, versatility, etc., are widely used in the port yard.
Press the door in the form of the structure, according to the main
form of beams, according to the main beam structure, according to use in
the form of classification.Simple single girder gantry crane
structure, easy manufacture and installation, small quality of their
main beam much for the partial rail box-shaped frame structure. Compared
with the double girder gantry crane,
the overall stiffness weaker. Therefore, when the starting weight Q≤50t, when the span S≤35m, can this form. Single girder gantry crane doors leg has L and C forms. L
type of manufacture and installation convenience, the force was better,
the smaller their own quality, but, lifting goods through space at the
relatively small number of legs. C-type legs made of sloped or curved shape, aimed at a greater horizontal space, so that goods pass foot.
