QN Type Double girders or beams Electric Overhead bridge Travelling crane with Hook and Grab

QN Type Double girders or beams Electric Overhead bridge Travelling crane with Hook and Grab

 General description

QN Overhead crane with hook and grab is widely used in loading goods in port, factory, workshop, power plant, steel melting plant, cement plant, waste renewable energy industry.

The working duty is heavy. The group classification of the crane is A6.

The direction of platform door to the driver’s cap is: side, end and top.

The lifting capacity includes the weight of the grab.

The open direction of the grab includes paralleling with the beam and plumbing with the beam, this design is the plumbing type.

The grab overhead crane includes main beam, lifting trolley, wheel, hook, pulley, electrics, grab.

Mechanical parts

Double welding box girder, beam deflection with DIN/FEM standard

Steel Material: Chinese standard Q235B and Q345B

Trolley rail is made of high strength hot rolled flat steel (16 Mn)

Epoxy zinc-rich painting for one bottoms and two sides of 120μm thick, to achieve a long lifespan, beautiful appearance and good luster

The girder and end beam are connected together by high strength bolts to ensure the structure strength and precision of the whole machine
The end beams are equipped with flat wheel or double rim wheels, anti-friction bearings, buffer blocks and derailment preventing end plate
Maintenance walkway is located on one side of the main girder, consisting of flower pattern plate, 1050meters handrail.

Safety protection system

1. Overload protection in the event of overload, the hoist unit switches off and only the lowering motion is possible
2. Long and cross travel limited by means of preliminary and final limit switches or Wireless anti-collision device
3. Anti-falling protection for the Three-in-One electric motor of trolley and crane prevents from accidental falling
4. All movements can be switched off by actuating the emergency-off switch at the control station via a main contact
5. High quality long time bearing polyurethane materials buffer fixed at the end of trolley travelling and crane travelling to prevent over traveling
6. Safety hook latch used for avoiding the lifted material out off from the hook
7. Audible and visual alarm device to inform the person stay near by the travelling crane.
8. Rain Cover for lifting mechanism of outdoor cranes, electric cabinet and driving mechanism
9. Protective earth conductor is fitted as standard
10. Voltage lower protection system
11. Current overload protection system

Technical parameter