Articles
Tower crane safety use
by Tiantian Xiaotiantian building materialsAt the bottom of the tower crane height and bearing the size ratio is larger, and the tower of the center of gravity high, large torque, brake frequently, huge impact, in order to increase the stability of it, we will analyze the main reason for the tower tilting has the following several:
First, the overload.Different types of cranes are usually controlled by lifting torque is given priority to, as the work scope or weight more than the corresponding rated load, the weight of overturning moment than its stable torque, it is possible to cause tower collapsed.
Second, the tilt hanging.Tilt hanging weight will increase its tilting moment, the lifting point will produce horizontal component and vertical component, at the bottom of the tower crane bearing point will produce an additional overturning moment, thereby reducing the stability coefficient of crane collapsed.
Three, tower crane foundation, endurance, straightness error is too large can cause increase of tower crane overturning moment, reduce stability of tower crane.Therefore, we should start from these key factors to strict inspection inspection checks, personal safety equipment to prevent major accidents.
Electrical safety
According to according to the construction safety inspection standards (JGJ59-99), the tower crane dedicated switch box will meet "just one brake a leak in a wooden case" requirements, the leakage protector of tripping rated current action should be taken more than 30 ma, the rated operating time is not more than 0.1 s.The driver room panel shall not be bare.Electric cabinet should be in good condition, complete closed tightly, locks, electrical components inside ark should be in good condition, line is clear, operation control mechanism Sensitive and reliable, and the limit switch performance good, arrange professional maintenance electrician to check on a regular basis.
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About Tiantian Xiaotiantian 
building materials
71 connections, 0 recommendations, 200 honor points.Joined APSense since, January 12th, 2015, From beijing, China.
Created on Dec 31st 1969 18:00. Viewed 0 times.
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