Cranes that operate in orbit on the open track are generally affected by natural wind. The wind factor was taken into account in the design. When the wind is greater than the specified value, the crane stops working. When the crane in the stopped working state is hit by strong wind, it may overcome the braking force of the crane brake of the running mechanism of the cart and slip. This uncontrolled gliding causes the crane to cause a strong impact at the end of the track so that it tilts over. The damage caused by our country every year is very large. Therefore, the hoisting machinery safety regulations stipulate that cranes working in the open track, such as gantry cranes, loading and unloading bridges, tower cranes and portal cranes, should be equipped with windproof and anti-climbing devices, namely windproof rail clamps and anchoring devices. Or iron shoes, etc.
In addition, terrain cranes may be present due to environmental factors in bridge cranes that work across the open air. It has a short duration, but the wind is strong enough to blow the crane for longer distances and may hit the end of the track, causing derailment or falling. Therefore, the hoisting machinery safety regulations stipulate that the bridge cranes that work in the open air should also be equipped with windproof rail clamps and anchoring devices or iron shoes.
Crane wind and anti-climbing devices are mainly divided into three categories, namely rail clamps, anchoring devices and iron shoes. According to the different ways of action of the wind-proof device, it can be divided into two types: automatic action and non-automatic action. The automatic action windproof device can automatically work when the crane stops running or suddenly loses power. The more advanced windproof device is equipped with an anemometer. When the wind speed exceeds the alarm wind speed value, an audible alarm signal is issued; when the allowable working wind speed value of the crane is exceeded, the running mechanism is automatically powered off, and then the windproof device is put into operation. . The automatic windproof device is generally complicated in structure, self-contained, bulky, and costly, and is mostly used for large lifting appliances. The non-automatic air-proof device is mostly manual, the mechanism is relatively simple, the weight is light, compact, and the maintenance is convenient, but the operation is troublesome and cannot cope with the sudden storm; and the clamping force of the manual rail clamp is small, which is mostly used on small and medium-sized cranes. For large cranes, in order to enhance the safety and reliability of the windproof device, several windproof devices are also used.
