Three members cranes and their safe use FAQs

Refers to the three components of lift hoist  hook,  wire rope  and brake. These three components if there are problems, 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. 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, 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.
    To ensure the safe use of Hoist equipment  three members, to prevent accidents, which requires the use of units and each crane operator must:
First, to ensure that anti-decoupling device intact hook, hook should be used with anti-collision; should wash to each lubrication point refueling; discovered at cracks, break or wear more than standard must be promptly replaced the pulley. To ground inspection hook body, hook mouth found cracks and wear more than 10% of the thickness and the opening degree of change, should be timely rectification. It is noteworthy that, hook welding defect can not be processed.
Second, the wire rope when in use, should avoid sharp turns. Crane from the (system) move, plus (minus) the slow speed required to prevent excessive force two Bengduan rope. Crane beside the power line operations, to pay attention to the power line to ensure adequate safety distance power lines to prevent the rope hit and burning. When the rope and buildings, equipment, sharp contact, should be fitted wood. Wire rope should be neatly arranged on the roll, not confusion, to avoid pressure damage. In the welding wire rim not prevent high arc and weld slag rope burns. The rope is too short not to take the long way to re-use. To strengthen the maintenance of wire rope, often with kerosene and other cleaning agents to wash away the dirt on the rope, and note the oil dip immersion rope. Operation, the operator should check once a day rope, wire rope careful to check for wear, broken wires, corrosion, changes in diameter as well as other physical and chemical changes, and pay attention to check the end of a fixed rope situation.
Third,  lift hoist  operation, the operator must carefully check whether the brake parts in normal operation, for jams, shoe clearance is appropriate, braking Lun surface is good, the adjusting nut is tightened. For brake lubrication should be carried out twice a week, but be careful not to stick in the friction lubricant components. If the brake shoe, brake wheel, small shafts, spindles, etc. excessive wear; main spring, auxiliary spring breakage or plastic deformation occurs; brake cracks, etc.; brake solenoid, electro-hydraulic pile rod failure, etc. , because of the timely repair, not sick to run, to ensure safety.