Portal crane Overview:
Portal crane is a spin-orbit types of rotary boom cranes. Widely used in construction, cargo loading and unloading dock, shipyard and construction and installation of large-scale hydropower. Heavy cranes in the door base unit, the rotation mechanism is equipped with a crane, gate-shaped frame is actually a load-bearing part of the crane. Here is gate-shaped base run institution, you can walk on the track. surface settings. The above is also equipped with a rotating mechanism from the boom and bluffing mechanism hoisting mechanism. Four agencies work together to complete the installation of equipment or hull section, or make loading and unloading of goods.
Part of the portal crane:
(1) Structural components: including the boom system, Rienzi Jiao, rotating platform, cab, door frame and so on.
(2) Institutional part: including lifting mechanism, bluffing mechanism, rotating mechanism, traveling mechanism.
(3) Electrical parts: Crane General Trench via cable reel or slip-line power, use of electric direct drive. Only when the power supply can not be resolved, before considering the use of steam power or diesel power generation complex drives. Electrical parts generally include wire and cable, central collector, motors, transformers, resistors, control cabinets, console, lighting and so on.
(4) The safety devices section include: limiting device, overload limiter, buffers, and windproof skid devices. The height of the cab, the engine room of more than 20m platform large gantry crane you should consider installing a subsidiary of simple lift.
Portal crane features:
(1) Operating mechanism has a higher velocity. Lifting speeds of up to 70 m / min (m / min), luffing speeds of up to 55 m / min.
(2) The rated lifting capacity range is very wide. General 5-100 tons (t), shipbuilding gantry crane, from the weight range is even greater now reached 150 to 250 tons (t).
(3) High efficiency. It can work 22 hours every day and night (h), when the station is also high efficiency. Usually up to 100 tons per hour.
(4) The structure is three-dimensional. Much occupied docks, freight yard area, with tall.
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