China machinery QTG315-3883 3ton Building Tower Trane Design with Drawing

1.The SELF ERECTING Tower Crane QTK20 Fast-erecting Tower Crane Has the characteristics of advanced technology ,whole-set transportation, fast erection, easy operation ,high efficiency ,etc
2.The QTK20 Fast-erecting Tower Crane is used to build the civil architecture with no more than 6 storeys. The max lifting height is 35 meters and the stretch mast of the QTK20Fast-erecting Tower Crane is available.
3.The tower mast can move after extending, The lifting jib can unfold or fold during the extend andcontract of the tower mast.
4.The whole installation of the QTK20 Fast-erecting Tower Crane can be realized only through adopting a wire drum and one wire rope.

5.The hoisting mechanism of QTK20 Fast-erecting Tower Crane regulated by the Variable Pole Speed Motor which can realize shift change with load and operation speed change.
There are exchanging device for changing hook assembly between 2 falls and 4 falls. Great torquemotor is adopted for the slewing mechanism.
The crane has braking equipment to avoid crane slipping under strong wind. The anti lack-phaseloading releasing device and anti high-speed & overload hoisting device are arranged on the QTK 20tower crane.
6.The QTK20 Fast-erecting Tower Crane is composed of chassis, slewing platform, tower mast , inner tower mast , outer tower mast ,hoisting jib and electric.