Industrial cranes are indispensable tools in construction and industrial production, and we can see them everywhere on construction sites. Cranes have characteristics such as large structures, complex mechanisms, diverse lifting loads, and complex environments. This also causes crane accidents to have their own characteristics. We should strengthen crane safety devices, understand the characteristics of crane accidents and the role of safety devices, and do to safe use.
Hoisting machinery is a kind of space transportation equipment, its main function is to complete the displacement of heavy objects. It can reduce labor intensity and improve labor productivity. Lifting machinery is an indispensable part of modern production. Some hoisting machinery can also perform certain special process operations during the production process to achieve mechanization and automation of the production process.
Hoisting machinery helps humans in their activities of conquering and transforming nature, enabling the hoisting and movement of large objects that were impossible in the past, such as the segmented assembly of heavy ships, the overall hoisting of chemical reaction towers, and the lifting of entire steel roof truss of sports venues, etc.
The use of gantry crane has huge market demand and good economics. The lifting machinery manufacturing industry has developed rapidly in recent years, with an average annual growth rate of about 20%. In the production process from raw materials to products, the amount of materials transported by lifting and transportation machinery is often dozens or even hundreds of times the weight of the product. According to statistics, for every ton of products produced in the mechanical processing industry, 50 tons of materials must be loaded, unloaded, and transported during the processing process, and 80 tons of materials must be transported during the casting process. In the metallurgical industry, for every ton of steel smelted, 9 tons of raw materials need to be transported. The transshipment volume between workshops is 63 tons, and the transshipment volume within the workshops reaches 160 tons.
Lifting and transportation costs also account for a high proportion in traditional industries. For example, the cost of lifting and transportation in the machinery manufacturing industry accounts for 15 to 30% of the total production costs, and the cost of lifting and transportation in the metallurgical industry accounts for 35% of the total production costs. ~45%. The transportation industry relies on lifting and transport machinery for the loading, unloading and storage of goods. According to statistics, loading and unloading costs account for 30-60% of the total freight costs.
When the crane is in use, the moving parts will inevitably wear out, the connections will loosen, the oil will deteriorate, and the metal structure will corrode, resulting in varying degrees of degradation in the crane’s technical performance, economic performance and safety performance. Therefore, before the wear and tear of the crane parts reaches the level that affects the crane failure, in order to prevent and eliminate hidden dangers and ensure that the crane is always in good condition, the crane should be maintained and maintained.
Proper maintenance and upkeep of the crane can play the following roles:
1. Ensure that the crane always has good technical performance, ensure that each organization works normally and reliably, and improve its integrity rate, utilization rate and other management indicators;
2. Ensure that the crane has good performance, strengthen the protection of structural parts, maintain firm connections, normal movement and function of electro-hydraulic components, avoid abnormal vibrations due to electromechanical factors, and meet the normal use requirements of the crane;
3. Ensure the safe use of the crane;
4. Comply with relevant environmental protection standards stipulated by the state and departments;
5. Reasonably and effectively extend the service life of the crane: Through the maintenance of the crane, the repair interval of the crane or mechanism can be effectively extended, including the overhaul cycle, thereby extending the service life of the crane.
