Regardless of whether the crane is used on any occasion, it should be performed in accordance with the operating standards of the instructions. The crane should be reasonably arranged during use. If there is an overload, it will be There are security risks. Depending on the tonnage of the lorry , there is a corresponding limit for the weight of the goods to be carried. Therefore, to ensure the safety of the construction site personnel and related assets, it is necessary to ensure reasonable use within the specified load limits. Some truck cranes with defects in their own design and manufacturing process have safety accidents during the hoisting operation. As an example, we will analyze the safety of the truck crane when it is overloaded. Some of the hidden dangers.
1. When the truck is in the process of designing, some of the selected lines and equipment are unreasonable, causing overheating under the condition of the specified load-bearing rated load.
2. Because the truck crane was not properly used during the hoisting operation, it caused the overloaded operation under a relatively long time, which led to the related equipment and the overheated condition of the line.
3. The truck crane itself is faulty and has not been repaired. It operates in the event of a fault. For example, a three-phase power supply has a defective phase. These various safety hazards directly threaten the normal service life of the truck crane and threaten the safety of the vehicle operators and construction site personnel. If there are some undesirable contact reactions with the truck crane, the contacts of each contactor are either insufficiently pressurized or have rough and uneven contact surfaces, all of which lead to overheating of the contactor contacts. Eventually it will cause a fire.
If the truck crane is in an abnormal operation for a long period of time, it will affect the normal use of the truck crane. When there is a short circuit condition on the bus, the current in each circuit will be It will increase to several times the normal time, and the heat generated will be proportional to the amount of current. When the temperature gradually reaches the ignition point of combustibles, it will lead to fire. Therefore, the truck crane must not be used under fault conditions or under overload conditions.
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