Reasons for falling of the hottest lifting hook

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Reasons for the falling of lifting hook lifting objects

two aspects of accidents

1. Casualties caused by mechanical failures due to design and manufacturing, installation, inspection, maintenance, failure to report for scrap and other reasons account for 60% - 67% of the total number of hoisting casualties, of which 42% are caused by problems in inspection and maintenance, which shows its importance

2. The year-on-year decrease caused by human unsafe behavior is 1.5%, accounting for 33% - 40% of the total number of hoisting casualties. Safe operation procedures and special operation personnel training are important conditions to prevent unsafe behaviors and reduce or even prevent accidents

reasons for the falling of the lifting hook

1. The unsafe state of the crane is first of all the risks caused by the non-standard design, such as overload protection failure, insufficient strength of the balance axle, no anti decoupling device, unreasonable selection of lifting appliances and rigging, etc; The second is manufacturing defects and installation defects, such as improper material selection and poor processing quality, which make the equipment with hidden dangers put into use. A large number of problems exist in the use link, such as not replacing scrap parts in time, lack of necessary safety protection, poor maintenance and faulty operation, resulting in out of control movement, parts or structure damage, irregular safety performance inspection, etc. In short, defects in design, manufacturing, installation, use and inspection may lead to serious consequences of the falling of the hook. The essential safety of cranes (design and control, you need to pay attention to the construction and installation of these places) is the basic condition to ensure the safety of lifting operations

2. After the label on the sling is worn, the unsafe behavior of the person carrying the tonnage can be identified by the color of the sling jacket. The behavior of the person is affected by many factors such as physiology, psychology and comprehensive quality, which is manifested in unskilled operation skills and lack of necessary safety education and training; Non driver operation, without certificate; Violate rules and regulations, act recklessly, and have bad operating habits; Misjudged operation, unclear command signal, uncoordinated cooperation between the crane driver and the crane worker, and human biological rhythm in the "three high areas", etc. In short, poor safety awareness and low operating skills are the main human causes of accidents

3. Bad environment with environmental factors exceeding safety limits or health standards, such as lifting operations in high dust, high temperature, high humidity, low temperature, high noise, windy days, poor lighting and other environments, will distract attention, directly affect the reaction ability of operators and the stability of technical play, increase the chances of misoperation and illegal operations, and lead to accidents. In addition, the poor working environment will also reduce the function of the crane system itself and even accelerate the failure of parts (components), becoming one of the unsafe factors

4. Safety management defect management includes the level of safety awareness of leaders; The management and inspection of cranes and the implementation of regular safety performance inspection; Safety education and training for relevant personnel; Special training for lifting operators, formulation of crane safety operation regulations, establishment of reward and punishment system for violations that can obtain the deformation of samples, and accident emergency plan, lack of effective monitoring and management of regular inspection of lifting equipment and lifting AIDS, etc. Any negligence and inadequacy in safety management is one of the important reasons for hoisting casualty accidents

there are both human and material factors causing the unhooking and falling accident of lifting objects. Therefore, in terms of equipment selection, safety protection measures, plant construction, lifting process, working environment, regular inspection, etc., it is necessary to carry out design, equipment purchase, installation and construction in accordance with the relevant national safety regulations and standards for lifting machinery. Starting from both human and material aspects, the user unit should formulate safety rules and regulations and operating procedures for crane operation, maintenance and management. At the same time, it should be clearly recognized that according to the relevant national regulations on the safety management of special equipment, the regular inspection and inspection of the safety performance of the cranes in use (including lifting AIDS) is one of the necessary guarantee conditions to ensure the safe operation of the lifting equipment in use and reduce or even eliminate the falling injury accidents of the hook and object of the metallurgical crane

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