2014年1月20日星期一

Some Information about Gantry cranes



A gantry crane is a sort of bridge gantry crane whose ‘bridge' is set on two legs horizontally and additionally shaped into a gantry. This kind of crane orbits on the ground. It mainly used in open storage yards, docks, power plants, ports, railway stations as well as other places for cargo handling together with installing goods.

A Brief Introduction about Gantry cranes
Gantry cranes are one of variants from bridge Gantry cranes. They are mainly used for loading and unloading operations for goods in outdoor and additionally indoor yards and also cargo bulks. The structure regarding this sort of gantry crane is similar with a door frame, which has a metal structure straightly located on the two bearing grinders; and then it can orbit on trails on the ground. What's more, there are overhanging cantilever on both ends associated with the main beam. There are several positive factors for using Types Of Cranes: they are with space utilization; the operating range is wide; they maintain good adaptability to the surroundings; they have good versatility along with characters. Gantry cranes are widely used in ports.

The Structures connected with Gantry cranes
1.Single girder Gantry cranes
The structure for a single girder gantry crane is simple. They are easy to install, not to mention light in weight. The main structure associated with a single girder gantry crane is off-track box-shaped structure. Comparing to double girder Gantry cranes, the stiffness overall is weaker.
2.Double girder Gantry cranes.
Double girder Gantry cranes have good carrying capabilities, overall stability, together with different varieties. What's more, the span is large. Yet, the weight is larger than single girder ones with the same lifting abilities, and also also the price is higher. This sort of Gantry cranes can also be divided into two groups by structure: box girder Gantry cranes, not to mention truss girder Gantry cranes. Box-typed are more popular.

Classifications related with Gantry cranes
There are mainly 4 kinds of Gantry cranes used in industries nowadays, together with each one concerning them has got specific usage.
1.Ordinary Gantry cranes.
The common structures related with this sort of Gantry cranes are container types together with truss types. They can carry things like bulk materials and then items, no heavier than 100 tons at a time, from one place to another, in a span from 4 to 39 meters. The grab crane is in a higher working class among Gantry cranes. An ordinary gantry crane contains a hook, a grab, an electromagnetic device, and additionally Overhead Crane; but also includes a semi-gantry crane
2.Hydropower station Gantry cranes.
This sort of Gantry cranes is mostly used for lifting and hoisting the gate regarding a dam. It can be used for the installation for the gate as well. The lifting of the crane can reach the level of 80-100 tons, but the span is a little shorter than of ordinary ones, which measures from 8 to 16m; the lifting rate is a bit low, which is 1-5m/min. This is a sort of crane that not being used often, because it can be kind of heavy. It really is in great need to improve the working class appropriately.
3.Shipbuilding Gantry cranes
They are mostly used for berthing the hull assembly. There are two lifting carts normally: one is equipped with two main hooks, runs on the top flange concerning rail bridge; the other is equipped with a main hook not to mention a secondary hook, runs on the bottom flange; this kind of structure is to orbit and lift hull sections easily.
4.Container Gantry cranes.
They are used at container terminals. After the dragging cart unloads containers from boats together with piles them up at the back or in the yard field, container Gantry cranes stocks them up and then deliver them away. It is a great way for speed up the turnover for cranes. This sort of crane can be used for stacking up container yards, which can put piled-up containers for 3-4 yards in height plus 6 rows in width. In most cases there are tire Gantry cranes, but rail Gantry cranes as well.

A Brief Introduction to Super Large Sized Gantry crane
Super large sized gantry crane is a type of gantry crane designed especially for bridge building. The primary parts relating to a super large sized gantry crane are by the primary beam, legs, crane and also other components. This stock is easy to disassembled and then transported because all the parts are connected by Bridge Crane Manufacturer. It really is over ordinary Gantry cranes because it's easy to install not to mention transport, and additionally it's convenient plus economical. This machinery is suitable for flowing constructing bridge-building teams.

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