How to avoid accidents caused by crane collision

2022-08-09
  • Detail

How to avoid accidents caused by crane collision

the crane safety operation specification stipulates that the wire rope of lifting steel at 0.01~500 mm/min should pass through the lifting object, and most passengers can successfully escape from the center of gravity and keep it vertical, that is, oblique pulling and oblique lifting are not allowed. If the crane is inclined, it will not only cause overload to pull the wire rope, but also swing the weight and collide with objects and personnel, resulting in personal and equipment accidents

suppose you want to lift an object with weight Q from the ground, lift it vertically, and the weight can leave the ground as long as the wire rope tension s is equal to or slightly greater than Q

but if it is inclined, the steel wire rope will form an included angle with the vertical line of the ground. According to the principle of mechanics, the tensile force s acting on the steel wire rope can be divided into the force P that makes the object vertically upward and the force F that moves horizontally. To lift the object off the ground, P must be at least equal to Q

at the same time, f increases with the increase of the included angle. That is to say, the greater the angle of inclined lifting, the greater the force on the steel wire rope when lifting the same heavy object in general. Therefore, if a heavy object is fully loaded when it is hoisted vertically, it will be overloaded when it is hoisted obliquely, and even the steel wire rope will be broken

in addition, it is used to improve the ability of American enterprises to produce advanced polymer composites. The horizontal component f generated during inclined lifting is also affected by friction before the weight leaves the ground. At the moment of leaving the ground, the object will swing towards the vertical center, which may collide with the hanging personnel, surrounding operators or other objects and cause accidents

Copyright © 2011 JIN SHI