Different Types of Cranes Used in Ports

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27 October, 2017

Different types of cranes used in ports

Ports have different lifting and lowering mechanical devices, some of which include cranes. These machines are capable of lifting different weights for and from various heights and from any boat or ship. To work effectively, hoists use cables and pulleys. There are different types of cranes used in ports, and which include the following names.

Floating Cranes

These are vessels that consist of winches attached to them. They are mostly used in the construction of harbours and bridges. These devices are also used in loading and unloading of unusually heavy objects in the port. Vessel hoists have the ability to lift over ten thousand tonnes. The floating type can also be used to recover sunken ships by use of the crane hook. Another important feature is that these vessels can move from one place to another. This means that they are flexible enough to move objects to designated locations. Some common types include semi-submersible and sheer legs.

Bulk-Handling Cranes

In ports, the most efficient and reliable method of handling the numerous amounts of bulky goods is by the use of grabbing hoists, which are operated through riggings. Bulk-handling winches are very efficient when it comes to controlling such materials as gravel, coal and foodstuffs like grain. Basically, they are useful in loads that prove difficult for man and other machines to handle. These devices are available as mobile or fixed devices. Bulk-handling machines can help a crane operator to handle about 2,300 tonnes every hour.

Gantry Cranes

Gantry cranes can be used in different industries. These machines are available in fixed or adjustable heights and are either made of steel or aluminum, depending on their purpose. The basic design of these machines features two upright beams that are attached to each other by a horizontal one. These two upright beams are linked to two A-shaped frames, which have wheels attached to them. This feature makes them movable and portable. The smaller version of gantry cranes is mostly used to move larger objects in the construction industry and in docks to move containers. In other instances, larger versions of this lifting device are used in such working areas as warehouses.

Hammerhead Cranes

This is one of the most common types of cranes used in ports and it’s also known as a giant cantilever. Hammerhead winch consists of a tall steel tower, which holds a horizontal double cantilever fitted with a lifting trolley that has a crane hook. The jib extends backwards, an important aspect for weight balancing. Note that the hammerhead wrench system is made with a racking motion that allows back and forth movements of the trolley. This motion also prevents interference with the height of the load. These cranes are also created in huge sizes and can lift loads of over 350 tones.

Tower Cranes

This is a modern type of balance wrench that is usually fixed on the ground. Tower cranes give a good combination of lifting capacity and height. They are mostly used to lift loads to very high heights, especially in shipyard constructions and to lift containers in havens. Extremely tall cranes can reach up to 1,000 metres high with a base of about 3.5 metres.

Deck Cranes

A deck crane can be found on a ship or boat. They are mostly used for cargo operations such as loading and unloading. These machines are also very useful for goods retrieval on shores that do not have unloading devices. Most of them are hydraulic operated. This means that they either use electric or diesel-hydraulic system.

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Other types of cranes used in ports include:

Rough Terrain Cranes

Normally, this is mounted on a carriage that is fitted with four wheels and is designed for places with a rough terrain. When hoisting, the outriggers extend both horizontally and vertically to balance and keep it stable. These rough terrain hoists use a single engine to power both its winch and undercarriage. The ability of this machine to manoeuvre through rocky and gravel filled places makes it very effective for carrying heavy loads through construction sites.

Overhead Cranes

This device is also called a suspended crane. Although they are mostly used in factories to lift heavy loads, a goliath crane is also used in a shipyard. They consist of hoists that are set on trolleys. The trolley is fitted in a way that allows it to travel along one or two beams. It also moves at angles in the same direction along the ground and elevated level.

Overall, these mechanical devices that are very interesting and powerful machines. A crane operator is highly trained to control and maintain these devices. Due to their ability to lift heavy and bulky loads for great heights, the gadgets are very useful for construction and port operations.

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