Crane imbalances
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Crane in operation at the time, sometimes will cause imbalance, which is usually said overturned. Then the crane what are the cause of the imbalance caused by?
Foshan crane.
, a crane in the running, if beyond the rated weight too much, can cause a rollover.
Second, because of the soft ground in crane leg support imbalance, such as leg subsidence etc., and then when the crane lifting goods roll and "rollover".
Three, crane boom in the crane to move the weight of the rotating speed is too fast, such as torque and centrifugal force work together to cause "tipping" crane.
Four, the driver error is also a common cause of crane "rollover", such as full load lifting crane boom, left arm operation, such as the crane barycenter offset and the "rollover".
Five, the crane on the road in high speed turning will easily occur due to inertia effect such as "rollover".
Count the cause of crane "rollover", can be found, center of gravity be unsteady, imbalance of the entire vehicle is the fundamental cause of the crane "rollover accident". So, in practice exactly how to prevent "rollover accident happen? Different operation conditions, should be different preventive measures:
1, driving the crane road, must be smooth, solid, reliable, parking place must be flat. To consolidate and send soft soil layer and underground foundation pit reinforcement, road surface should be smooth and solid, when necessary, the crane parts shall be laid sleepers, roadbed box or walking plate steel rail;
2, binding component of the sling, rings should be through calculation, the hoisting tools used, should be for maintenance, and periodic inspection, the damage exchange were analyzed. Binding method should be correct and reliable, in case of hoisting, sling breakage or slip from the artifacts, the crane suddenly weightlessness and tilting;
3, vertical and large components, it is necessary to find out the weight and binding and reliable. Weight is unknown, binding rickety artifacts, may not be lifting, in case the crane arm broken;
4, the lifting component, sling to remain vertical, oblique towing shall not exceed the crane turning radius, so as not to overload and slippage or pulled the rope, wire rope to the unstability of the crane. Lifting heavy components, should be a pull on the rope. Vertical, crane arm lifting, lowering, turning to smooth, can not shake in the air, at the same time try to avoid the phenomenon such as emergency braking or shock vibration. Not reliable technology measures, such as adding balance weight at the end of the crane, crane cable wind rope back, without the approval of the relevant technical departments, etc., shall not be lifting. It is strictly prohibited to overload hoisting crane, lest cause crane accelerated wear of mechanical parts and tilting;
5, crane should avoid driving at full capacity, in full or close to full capacity, it is strictly prohibited to simultaneously improve with rotary (lifting and horizontal movement or lifting and walking) two kinds of actions, lest by reason of road uneven or inertia force, cause the crane overload, and lead to a rollover accident. Such as must be short, hanging component components will turn to the right in front of the crane, component height less than 50 cm off the ground, pull the slip line, prevent oscillation, and to slow down;
6, when two hoisting machinery operation at the same time, between two machine hanging hook component should maintain a safe distance of 5 meters, avoid collision accident;
7, in the process of hoisting, such as interruption due to power outage or mechanical failure of the homework, must take measures to deal with, may not be long elevator component in suspended state;
8, hoisting, should have the specialist is responsible for the unified command. Controllers should be located in the operator can vision and location, and can clearly see the whole process of hoisting, foshan crane drivers must be familiar with the signal, and follow the various signal controllers, abide by the procedures, obey orders to listen to the command, and shall not leave without authorization. Signal from the command signal should be uniform in advance, to distinct and accurate.
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