Grúa Pórtico

Grúas pórtico para patios de fundición de precisión para la construcción de puentes sin fisuras y la manipulación sin esfuerzo de vigas prefabricadas

The casting yard gantry cranes lift the prefabricated girders from the girder-making platform to the girder storage platform and then lift the girders from the girder storage platform to the girder truck after completing the maintenance of the prefabricated girders. The girder lifting machine also assists with the assembly of the bridge erecting machine, dismantling the bridge erecting machine, and erecting the girders of the dry bridge whose pier is not high. It is suitable for highways, bridge girder yards, and bridge erection.

Casting yard gantry cranes structure

A crane consists of a gantry steel structure, trolley, trolley running mechanism, electrical system, and other major components.

The Crane gantry shape is A-type, the gantry structure of formed of rigid legs and a flexible leg support structure, increasing the overall flexibility of the price of the gantry to improve the carrying capacity. The truss structure is mainly used in places with large outdoor wind loads because the wind area is smaller than the box structure.
The fetching device can be a hook, spreader, and pin-type dynamic pulley set.
The form of the trolley has a single trolley, double trolley two kinds of trolley, two trolleys can work alone can also be linked.
The crane moves longitudinally on the track through the big trolley, and the trolley moves transversely on the crane gantry, and the hook lifts and lowers, realizing the moving, loading unloading, and stacking of materials or bridges. The trolley is equipped with a set of independent lifting mechanisms. The trolley assembly is equipped with a rain cover.
In addition to rail clamps, the crane can also be equipped with wind brakes such as anchoring devices, anchoring devices, wind speed/direction gauges, and other windproof braking devices.

Casting yard gantry cranes features:

1. The lifting mechanism and running mechanism run at a low speed to improve the precast girder alignment accuracy and reduce the impact on the structure of the girder lifting machine.

2. the internal space of the girder lifting machine should be large enough to meet the lifting of prefabricated girders and the assembling of bridge erectors.

3. the main steel structure should be considered for disassembling and transporting on the premise of meeting strength, rigidity, and stability.

4. the use of two lifting prefabricated girders should satisfy the synchronous operation of the two machines.