Gantry crane type

Gantry cranes are divided into four types.

① ordinary gantry cranes: This crane is the most versatile and can carry a variety of items and bulk materials into, from the weight of 100 tons, a span of 4 to 35 meters. Grab the ordinary with a gantry crane working level is higher.

② Station Gantry Cranes: mainly used to lifting and hoisting gates, but also for the installation. Lifting capacity of 80 to 500 tons, span is small, 8 to 16 m; lifting lower rate of 1 to 5 m / min. This  overhead bridge crane  lifting, though not often, but once the work is very heavy use, it should be appropriate to increase the working level.

③ shipbuilding  overhead gantry crane  : for the berth assembled hull, standing with two lifting car: a machine with two main hook, the bridge on the flange orbit; another has a main hook hook and a deputy in the bridge lower flange orbit for flipping and lifting large hull section. Weight is generally from 100 to 1500 tons; span of 185 meters; lifting speed of 2 to 15 m / min, and 0.1 to 0.5 m / min jog speed.

④ container gantry cranes: for the container terminal. Trailer Bridge will quay container unloaded from the ship carrying the container shipped to the yard or rear, by the container gantry crane stacking up or direct loading carried away, can speed up the container carrying the crane bridge or other turnover. Can be 3 to 4 layers stacked high, wide 6 rows of container yard, general use tire, but also useful rail type. Container gantry crane and container straddle compared to its span and height on both sides of the door frame are larger. To meet the transportation needs of ports, this crane working level is higher. Lifting speed of 8 to 10 m / min; span across the container needed to determine the number of rows, the maximum is 60 meters corresponding to 20 feet, 30 feet, 40 feet long container from the weight of approximately 20 tons, 25 tons and 30 tons.

④ carrying bridge

Increased by a  hoist gantry crane  bridge span evolved a crane, also known as the loading bridge. For open storage yard, port and railway cargo terminals and other places. Common carriage bridge gantry crane with a large structural similarity. Characterized by: ① mainly targeted bulk handling bulk materials; ② span, generally 30 meters or more, some up to 170 meters; ③ jobs frequently, high productivity, usually 500 to 1500 tons / hour, high working speed lifting speed of 60 to 70 m / min, the car running at 100 to 350 m / min, the higher level work; ④ carrying bridge operating agencies will only be used to adjust the working position, a non-working institutions. When the span is large, the bridge carrying the bridge is supported on a rigid support legs and a flexible leg. The legs of the bridge can be used with the bolt; flexible leg with coupling may also be by a ball hinge or hinge pillar, the flexible leg relative to the tray with a range of deflection. Composed by a truss girder bridge, lifting the car in its top chord or bottom chord orbit. Some cars with rotary arm, the equivalent of a run on the bridge crane jib.

In container shipping port quay running bridge, is a special structure of large cranes, dedicated to the ship's container handling work. Both sides of the generally rigid legs, form a strong door frame, the bridge is supported on the upper part of the door frame on the frame integrally. With a container spreader (see cross-car) trolley runs on the bridge. Long cantilever toward the sea is usually pitching. Non-operating state, the cantilever can be lifted at 80 ° ~ 85 ° elevation, that it carries over the bridge to the highest point on the ship. Job cantilever flat. Some cantilever is fixed.