What are the types of windproof devices for large loading and unloading machinery in ports?

windproof devices for sts crane

At present, the large-scale lifting machinery used in many ports in my country cannot meet this requirement, and technical transformation must be carried out, focusing on the windproof method and windproof device under working conditions. Now take the quayside container loading and unloading bridge (hereinafter referred to as the quayside bridge) as an example to introduce. The wind protection in the working state is to prevent accidents caused by the accidental slippage of the crane due to the sudden strong wind in the working state through some kind of wind protection device. At present, the large-scale lifting machinery used in many ports in my country cannot meet this requirement, and technical transformation must be carried out, focusing on the windproof method and windproof device under working conditions.

The function of the windproof device in the working state is to prevent the quay crane from crawling along the track due to the sudden gust of wind in the operation project. What are the types of windproof devices for large-scale loading and unloading machinery in ports:

1. Rail clamp

This is a traditional windbreaker. When the crane vibrates under the impact of strong wind. The rail clamp is easy to fail due to the sliding of the clamp body, and its clamping surface is relatively small on the side of the crane rail, the deflection of the rail may have a serious impact on the clamping effect. These factors lead to its poor windproof reliability. The windproof ability of the rail clamp is small, because it has few points of action, and each car can only be equipped with 2 sets (1 set on each side of the sea and land). The clamping force of the commonly used rail clamps is generally below 440kN, and the frictional resistance of each rail clamp under ideal conditions is only 264kN.

2. Top (press) rail device

This is a kind of windproof device that is used more at present. The top rail device is directly fixed on the track tread, and its function is relatively reliable, but the deflection of the track in the vertical direction will have an impact on the top rail force. So how reducing the track deflection is very important. In addition to improving the quality of track laying, the most important measure is to choose the installation location, which should be installed under the main balance beam under the door leg as much as possible, so that the distance between the wheel fulcrums on both sides of the top rail device is the shortest. The role of the top rail device is also less, and generally, only 4 sets can be installed on each car (2 sets on each side of the sea and land). At present, the top rail force of the largest top rail device is 400kN, and the friction resistance generated by each top rail device under ideal conditions can reach 160kN.

3. Wind wedge

The windproof iron wedge is simple in structure and low in cost but has poor reliability and limited windproof capacity. For large-scale automatic control cranes, the operation failure is very high. It should not be used in large lifting equipment, especially in PLC-controlled cranes.