Crane agency generally only four driving and driven wheels, if great weight, increase common approach from the wheel to reduce the wheel pressure. When the wheels than four, must be balanced hinged frame means that the crane load is evenly distributed on each wheel. Bridge metal structure from the main beam and side beams, divided into single girder bridge and two double-girder bridge. Single girder bridge by a single span girders and located on either side of the end beam composed by two double-girder bridge girders and end beam components. Main beam and side beams rigidly connected at both ends of the end beam which wheels to run on an elevated bridge support. The main beam welded track for lifting the car running. The main beam of the bridge structure type more typical box-shaped structure, four truss structure and fasting truss structure. Box-shaped structure can be divided into two-track box girder, double girder off-track box, off-track box single girder several. Double track box girder is a widely used basic form, the main beam from the vertical web of upper and lower flange plates and sides of the composition, the car rails disposed on the flange plate on the center line, simple structure, Manufacturing convenient, suitable for mass production, but larger self. Partial rail box and section single girder Partial rail box double beam are made on the lower flange plates and unequal thick insulating primary and secondary webs consisting qy double girder crane, trolley rails disposed above the main web, cabinets short stiffener may be omitted, in which the off-track single girder box is a box girder flange width instead of two main beam, the smaller the weight, but the manufacturing is more complex. There are five main types. 1, casting crane for lifting hot metal injection Mixer, furnaces and continuous casting molten steel into the lifting device or ingot molds and other purposes. Main car lifting ladles qb proof double girder cranes, deputy car flipped ladles and other auxiliary work double girder crane, in order to expand the use of auxiliary hook and better services for the steelmaking process double girder crane remote control, main and auxiliary hooks are arranged in each trolley Lord independent agencies, deputy small car, and were run along different tracks. There are four common form of structural beam four-track rail and four-six beams. 2, use tongs to clamp crane vertically lifted to a high temperature ingot soaking pit furnace, or take it out into the car shipped ingot. 3, ingot crane for removal from the ingot mold ingot forced prolapse. Small car has a special dummy device off, way off the starter according to the shape of the ingot mold may be: some off undesignated rod pressed ingot ingot crane, lift the ingot mold with tongs; some with tongs pressed ingot mold, with Lift the small clamp ingot. 4, charging crane to be added to the open hearth in charge. The lower end of the column containing the main car pick rod to provoke tank and place it into the furnace. The main column rotation about a vertical axis, pick the rod up and down swing and swing. Deputy trolley for furnace repair and other ancillary operations. 5, forging hydraulic machine with a crane for the forging of large parts. On the main trolley hook suspension feeders special turn for support and flip the workpiece; Vice cart used to lift the workpiece. qb proof double beam crane double girder crane _ _ Jiaohe heavy generous generous by heavy machinery Co., Ltd., Henan Province. 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!