As an important operation machine in construction machinery, we need to know more about the crane, so that our operation efficiency can be improved. The following will introduce ten related common sense crane machinery to help users better use it.
Find a safe position

It is not safe to work directly under the sling or to walk because the sling may fall on you. In the lifting operation, under the boom, under the lifting object, before the lifting of the lifting object, the triangle area of the guide pulley steel rope, around the fast rope, and standing in the cable-pulled hook or guide pulley force direction are all very dangerous parts. Therefore, the staff position is very important, not only to always pay attention to themselves, but also need to remind each other, check the implementation, in case of accidents.

Correctly understand the safety factor of hoisting rigging

In the hoisting operation, the staff has no correct cognition of the safety factor of the sling, and it is often based on continuous use, which makes the overweight operation always in a dangerous state.

Demolition operations to encounter a variety of situations have to anticipate

The evaluation of the weight of the object, the thoroughness of the cutting, the extrusion of the removed parts to increase the load, and the forced lifting of the connection parts without inspection, etc.

Eliminate the error operation

Lifting operation is different from a lot of construction, involving a large range, often using different units, different types of cranes. Daily operating habits, performance, differences in command signals and other factors can easily cause misoperation, so special caution should be taken.

Bind the hanging object firmly

When high altitude lifting is removed, the suspended object should be "locked" rather than "pocket"; The sharp edges and corners of the hanging object should be taken "cushion" measures.

Not tight to the drum rope

Heavy lifting and dismantling, the steel rope winding on the drum of the crane or the motor hoist is arranged loosely, which causes the fast rope with a large load to pull into the rope bundle, causing the fast rope to shake violently, and it is easy to destabilize. As a result, it often appears that the operation is dangerous and the awkward situation can not stop.

Temporary hanging nose is not welded firmly

1. The welding strength of temporary hanging nose is not enough. Welding strength is not enough, refers to the welding base metal surface corrosion, welding before removing the rust is not complete, resulting in beautiful appearance of the welding meat, and the actual welding meat and base metal did not melt together, the load increases or is affected, and the fracture occurs.

2. The force direction of the hanging nose is single. When a long cylindrical object is hoisted or lowered, the force direction of the lifting nose changes with the change of the Angle of the object. However, this situation is not considered enough in the design and welding of the lifting nose, which leads to the sudden fracture (breaking) of the defective lifting nose during the lifting operation. In this case, it is necessary to weld the vertical plate on both sides of the hanging nose in advance, and the size and thickness of the vertical plate are best designed by technicians.

3. The hanging nose welding material does not match the base material and the informal welder welding.

Improper selection of lifting tools or lifting points

There is a lack of theoretical calculation for setting up lifting tools or using pipelines and structures as lifting points. The carrying capacity of lifting tools or pipelines and structures estimated by experience is not enough or the partial carrying capacity is not enough, and the instability of one place leads to the overall collapse.

The choice of pulley rope is unreasonable

When setting up lifting tools, the understanding of the force changes of pulleys and tethered pulleys caused by the change of the Angle of the fast rope is insufficient. The tonnage of the guiding pulley is too small, and the rope of the tethered pulley is too thin, which causes the rope to break and fly after the force overload.

Unreasonable selection of hoisting rigging without load

There are many accidents that happen like this, the lifting work has finished, when the hook with the empty rope and rigging operation, the free state of the sling hanging pull has been removed by the hook or other objects, the operator or command personnel such as response is not timely, instant accidents will occur, and this kind of accident has very bad consequences for the operator and the crane.