High efficiency building construction QTZ40 tower cranes

High efficiency building construction QTZ40 tower cranes

Tower cranes are a modern form of balance crane that consist of the same basic parts. Fixed to the ground on a concrete slab (and sometimes attached to the sides of structures), tower cranes often give the best combination of height and lifting capacity and are used in the construction of tall buildings. The base is then attached to the mast which gives the crane its height. Further the mast is attached to the slewing unit (gear and motor) that allows the crane to rotate. On top of the slewing unit there are three main parts which are: the long horizontal jib (working arm), shorter counter-jib, and the operator's cab.

Components description

Mast: the main supporting tower of the crane. It is made of steel trussed sections that are connected together during installation.

Slewing unit: the slewing unit sits at the top of the mast. This is the engine that enables the crane to rotate.

Operating cabin: the operating cabin sits just above the slewing unit. It contains the operating controls.

Jib: the jib, or operating arm, extends horizontally from the crane. A "luffing" jib is able to move up and down; a fixed jib has a rolling trolley that runs along the underside to move goods horizontally.

Counter jib: holds counterweights, hoist motor, hoist drum and the electronics.

Hoist unit: the hoist unit houses the hoist drum, hoist cable, gear box, gear shift, brake, and supporting components.

Hook: the hook (or hooks) is used to connect the material to the crane. It hangs at the end of thick steel cables that run along the jib to the motor.

Weights: Large concrete counterweights are mounted toward the rear of the mast, to compensate for the weight of the goods lifted.

Packing & Delivery terms:

1. Hoist and electric parts will be packed by plywood crate, for avoiding the demage from goods crash and impact during the delivery.

2. Girders and other main parts will be packed by plastic woven cloth, for preventing rust from soppy condition during the transportation.

3. Only the best transport solution will be taken for saving your cost uttermost on finance, security and time.

Company Information

Dowellcrane Machinery Group is a China-leading group of crane businesses which was founded in 1955, Only one company has 60years manufacture experience. And serving a broad range of customers all over the world to provide a complete set of advanced lifting project, including Gantry crane, Bridge crane, Jib crane, Accessory. Our clients include manufacturing and process industries, shipyards, ports and so on. Regardless of your lifting needs, dowellcrane Machinery Group is committed to providing you with lifting equipment and services that increase the effectiveness and value of your business.

a). Dowellcrane Machinery Group have already obtained the CCC,CE,BV,SGS,ISO OHSAS certification's and have won over 60 honors.

b). China's leading mechanical research and design institute and famous university provides advanced technical support for us.

c). Serviced for more than 5000 companies, and the products popular in more than 40 countries.

d). Through decades of unremitting efforts, now, dowellcrane Machinery Group covers an area of 180,000 square meters and over 380 sets of advanced equipments. Management staff reach to 860, and our worker have more than 10000.