Accidents occurred frequently in lifting appliances. According to the statistics of the AQSIQ in recent years, the accident rate and the number of casualties caused by accidents are still high. This is a big problem that every hoist, manufacturer, society and even the state can not ignore, and is also an urgent problem to be solved. Cranes are not dangerous, but attention should be paid to the operation and use of cranes, the production process and quality control of equipment, and the revision of safety regulations for cranes in the state, so as to avoid accidents.
We can sum up the safety accidents of hoisting machinery as human factors, manufacturing defects, basic defects, installation defects, wear and corrosion, environmental factors, etc. These are the main culprits of the accident rate of lifting appliances.
In the process of using cranes, the failure of the management or the safety factors of the machine operators are not considered properly, which has caused the accident of crane. With the restructuring of state-owned enterprises and the development of private enterprises, it is difficult to ensure that every lifting appliance is operated by qualified personnel. In addition, the safety awareness of special equipment in private enterprises is also an important reason for safety accidents. On the other hand, equipment management includes routine inspection and equipment plan and repair. Daily inspection is mainly for checking the safety performance of equipment, and is often the easiest to ignore. Some enterprises do not even arrange the repair plan for the annual lifting appliances. In addition, illegal operation is also the main reason for safety accidents in the process of using cranes.
The manufacturing technology level is backward. There are some differences between the standards of lifting appliances and the standards of Europe and America. The technical contents of some small and medium-sized lifting appliances themselves need to be improved. In addition, because of the market competition, the profits of the production enterprises are very limited, and the funds to invest in new products are limited.
In the development and design of new products, some lifting machinery manufacturers have not fully considered the load conditions of the force components in various application environments. The reliability of the lifting system's braking system is the key factor determining the safety performance of the hoisting machinery. Most of the safety accidents occurred during the use of lifting appliances are related to lifting mechanisms. The lifting mechanism basically adopts electro magnet electromechanical brake. The key of action reliability is the control of the electromagnet coil, and the design of the electrical control system of lifting machinery is a weak link that has existed for more than 20 years.
This is the three key problem of crane accidents, and the key problems should be solved in time. So how do we do that?
First, since the supervision and inspection of cranes for a long time is carried out after completion of the supervision and inspection, the inspection and inspection of the installation process according to the new inspection regulations requires all inspectors to change their concepts and improve their business level. Theoretically, we should strengthen the learning and understanding of inspection regulations, understand the weak links in the manufacturing and installation process, and work out practical workshops guidance documents to ensure the quality of inspection. On this basis, in the regular inspection process of the previous lifting appliances installed in the future, in addition to routine inspection according to the inspection rules, we should also check the links which are easy to cause safety hazards and defects in the installation and manufacture, and add some necessary testing items by means of * * * * * detection methods to prevent accidents.
The two is to encourage Chinese and foreign cooperation in the production of lifting machinery, the introduction of * * * * * * * technology, improve lifting machinery technology content and safety performance and lifting machinery in China's overall manufacturing level.
Three is to strengthen the supervision and management of lifting machinery industry, and crack down on illegal and over range production cranes. In terms of policy, it is tilted to those lifting machinery manufacturers with high technology content and high safety performance, to eliminate or shut down some enterprises with low technology content, low safety performance and low price competition, and encourage lifting machinery manufacturers to introduce high-tech talents, especially those in control system, and design new ideas for lifting appliances.
In fact, there are many reasons for the accidents of lifting appliances, so that all construction units can maintain high quality production. This is the most important. From this point of view, we should increase efforts to solve the key problems and prevent accidents. No accident is a kind of injury to every family. It is a great loss to every construction unit. Every manufacturer is bruised by brand reputation, and it is not good for everyone. We need to make every effort to break the weak links.