in order to produce high-end products, such as nuclear ring cranes, large weight

Crane manufacturing industry is closely related to urban construction, transportation, energy development and other people's livelihood cause of the industry. In recent years, China's crane industry has achieved rapid development. To bridge gantry crane manufacturing company, for example, to 2008, China's bridge gantry crane has about 450 manufacturing enterprises, employing over 14 million people [1]. If these enterprises are divided into three echelons: big play, too heavy in the first echelon, they are the industry's largest economy enterprises, with national technical center, comprehensive strength, in order to produce high-end products, such as nuclear ring cranes, large weight metallurgical cranes, foundry cranes, large dock cranes, etc.; second tier that includes Weihua Group, including China's top 20 companies, most of them have plant-level technology center, which is the establishment of Weihua Group regional technology center in Shanghai set up a product design and Research Institute, these enterprises are the backbone of the industry, products cover a wide range of high-end Pallet stackers both in bidding, also participated in the competition from cheap generic products; third echelon is the remaining four hundred SMEs, which generally are small, roughly the same product type, and to be priced competitively based market share effective strategies to enable these enterprises generally poor, severely hampered the pace of development
the inspection of the overhead traveling crane pulley. Focus on the bottom wear is excessive and cast iron pulleys for cracks. For institutions pulley overlooking Yang balance wheel, because it does not operate normal conditions, it is easily overlooked. So, be sure to check before installation flexibility of its rotation, otherwise, the installation length of rope around overlooking Yang and tension can not balance wheel to automatically adjust, so that an increase in the height adjustment overlooking Yang rope and operational risk level of difficulty.