Crane Universal Trolley Security And Economic Evaluation

The hoisting devices plays an important role in modern production and life. However, the endless hoisting devices accidents has brought great pain and loss to country and the peoples recently. Now the major problems are how to reduce and prevent the occurrence of the accidents. Through the research by many experts and scholars at home and abroad, found that if a reasonable safe assessment give to devices before the accident was happened, find the potential risks and failures, and take reasonable safety precautions timely, this can effectively reduce and prevent accidents.The study for safety evaluation method is late in china, especially for the professional machinery and devices. Currently, the safety assessment to hoisting devices almost though on-site analysis and inspection to determine hoisting devices safety qualitatively by experts or inspectors. This evaluation method with the longer evaluation cycle, the evaluation process is complex, the potential risks and failures is difficult to detect in time, and evaluation process often influence by human factors, also the good or bad of the evaluation results have huge relation with knowledge and experiences for the experts and inspectors.In regard to deficiency of safety evaluation method for hoisting device in our country, this article take the general trolley traveling mechanism of crane for example to evaluate the safety of the system. A safety assessment model for trolley traveling mechanism system is set up base on FMEA (Failure Mode Effect Analysis), including fuzzy sets theory and AHP(Analytic Hierarchy Process), which can be qualitatively and quantitatively evaluate the safety of the system. In so doing, it would be easier to determine the safety class and score of the whole system. According to the evaluation results of the system, improving measures can be taken by the enterprise or department concerned in hoping to prevent the accidents effectively. In view of the accidental economic loss for hoisting devices is difficult prediction and calculate, based on analyzing the elements and classified method of accidental economic loss at home and abroad. This article use Statistical Standard of Economic Losses from Injury - Fatal Accidents of Enterprise Staff as the calculation model, and combine the advanced foreign accidental economic loss calculation method, so it can prediction and calculate accidental economic loss quickly after the accident was happened.A safety assessment system for general trolley traveling mechanism of crane was built based on software Visual C++ and Access database which has powerful storage capacity for all of the evaluation process above. Through a safety analysis and assessment on crane in-service, it can be concluded that the result of assessment is consistent with the practical situation of the trolley traveling mechanism, it can wholly reflect the safety of system quickly. Thus, it can provide an effectively synthetic evaluation method for safety and economic assessment of general trolley traveling mechanism.