Line hanging (Gantry) crane line, also known as traffic, cranes, crane, it is the people called for a sweeping crane line hanging and what we call the gantry cranes, bridge cranes basically the same. Category by driving There are basically two types: one is focused on driving 3t crane line, the other for each drive. Focus drive line hanging which uses an electric motor to drive the long drive shaft on both sides of Active Wheel. Line hanging are driven separately driven initiative that is on both sides of each wheel with a motor drive. Medium and small more using a combination of overhead crane brakes, gear units and motors into one of the "triple play" drive mode, the large overhead crane lifting capacity of the ordinary for ease of installation and adjustment, the driving device often used universal coupling . According to the shape can be divided into two categories 1t line hanging, which gantry cranes and gantries. Line hanging valve wear a reason, line hanging fatigue operation, hydraulic valve springs and related balance valve, valve seat, in the long-term high variable loads work, will produce fatigue and crack, causing the spring to shorten the length of the entire fracture line hanging Second, parts deformation, but has been in use, the residual stress of hydraulic valve parts in the process and use of the residual load stress exceeds the yield strength of domestic and foreign component materials; beam, and seat sealing surface spalling, damage and failure , parts deformation, and failure can not complete the required functions; third, long line hanging in inferior environments, resulting in a large area of ??corrosion, hydraulic oil mixed with water or acids is too high, the use of a longer time will corrode the hydraulic valve The relevant parts to fail and lose their accuracy. Line hanging beams | Huayin line hanging | generous offer by the generous heavy Ltd Henan heavy machinery. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) strong, credible, in Zhengzhou, Henan engineering, construction crane industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving generous innovative ideas will lead into the brilliant heavy and you work for a better future!