full span and segment Launching Gantry for bridge construction site

It composed of horizontal moving girder devices, main girders, support system, vertical moving gantry devices, horizontal moving gantry devices, hydraulic system and electrical control system.

Highway bridge is the highway bridge prestressed concrete beam tablet or beam section lifting to bridge bearing on the special construction machinery. Mainly by the beam longitudinal shift flat car assembly, girder components, support system, the longitudinal shift system, the transverse system, hydraulic system, electric control system components.

Structure
1.Main girder
Be welded of steel plates, connected by high-strength precision bolt. There are sliding rail for trolley to travel upper the girder which is fixed on outrigger by hightension
precision bolt.
2.Outrigger
a.Consist of rigid outrigger and flexible outrigger, all connection points are connected by high-tension bolt
b. The ladder is used by operator to enter into cab or arriving at winch.
c.When the span>30m,there need a flexible leg aiming at reducing the lateral thrust the trolley has to the rail when the girder load objects.
3.Travelling mechanism
Consist of driving gear box and passive wheel box
a.The driving gear box supplys power to realize the crane’s travelling
b.Passive wheel box lacks transmission structure such as dynamo, reducer and a pair of exposed gear
4. Platform
Platform is installed in order to maintain the crane,the protective guard is added to protect the safety of serviceme.
This is the considerable device.
5.Trolley with hoist
Be made up of trolley frame, winch and pulley block
a.Trolley frame welded of steel plate is the loading and travelling mechanism of trolley with hoisting
b.Winch is the lifting mechanism of trolley..when it works, wire rope affects the pulley as rising and falling movement, which makes suspended objects lifting and Lowering