Cranes Three members Frequently Asked Questions

Refers to the three components of crane hook, wire rope and brake. These three components if there are problems,hoist gantry crane can easily cause hanging objects falling, and even cause serious injury or death.
    Hook common problem is extremely heavy rope decoupling, which is not good when the object is tied, extremely heavy rope angle between more than 120 degrees, or lifting the hook side is touched, the weight resting on the bottom by rope from the hook when jin in pulling. In addition, because the hook line of gray cast iron or cast steel material, its brittleness, intolerance to touch, easy to break, therefore, in the process of hanging objects, narrow or if the site is operated by an operator when the effect, pulleys due to collision damage. Once the pulley damaged, it can cause lacerations rim cut the rope, and even cut off the rope and cause an accident.bridge gantry crane If the operator does not come in time to hook pulleys, pulley may be due to rotation is not flexible bottom wear caused by excessive, long time, will be half-split pulleys, hooks will be issued in the operation of an accident. Moreover, the amount of wear increases when the bottom, will make the amount of wire embedded deep in the country, increasing the friction resistance, resulting in wire embedding capacity to enhance and increase the resistance, resulting in accelerated brushed steel scrap.

    Rope FAQ human factors more generally. For example, the operator is in operation, the wire rope and some equipment and buildings often friction, scratching, resulting broken wire rope outer local deformation; operation roll, wire wound on the reel multilayer disorder; hook in the air often spin, rope kink; rope long-term lack of oil to the surface rust; rope often subjected to high temperature burning grill and electric ignition and burning rope encounter is caused by accidents such as causation.

    Brake common problems are: the main spring brake adjustment too loose or damaged, the brake torque is insufficient; brake pad excessive wear revealing cap nails, causing friction force is not enough, brake brake weights; brake lever locking nut loose, leverage traverse,overhead gantry crane or lever system and other effects of the joint is jammed brake; brake shoe opening gap is not normal, and some brakes on, while shoe clearance up to 2 to 3mm, while the other side is also affixed production Gava the brake wheel, so the wear pads and brake wheel speed, heavy load can not be stopped car. Further, the brake is too tight disadvantageous because when the brake open gap is less than the normal value, the resistance of the brake wheel rotation will increase, often smell naphthalene leather smell, when the thermal expansion of the friction, it will brake the car and accidents.