Four truss structure a combination of four pieces of plane truss structure into a closed space, generally in a horizontal truss paved walkway surface plate, light weight, stiffness, but compared with other structures, size large, complex manufacturing, fatigue lower intensity, has less production. Partial fasting truss structure similar rail box girder, a closed structure consists of four steel plates composed of, in addition to the primary web is solid web-shaped beam, but the remaining three steel plates in accordance with the design requirements into many windows form a non-inclined pole fasting trusses, the upper and lower horizontal surfaces covered with catwalk truss plate Shanghai double beam crane manufacturers, crane operation mechanism and electrical equipment installed in the double girder bridge crane inside how much lighter weight, the overall stiffness, which is in Chinese One type is more widely used. Common bridge crane mainly electric drive, usually operated in the cab, there are remote control. From the weight of up to 500 tons, span up to 60 meters. Easy-beam bridge crane, also known as crane beam, its structure and composition is similar to ordinary bridge crane, from the weight, span and work rate are small. Bridge the main beam is a simple cross-section beam by a beam or other beam and plate steel composition, hand pull hoist or trolley hoist coupled simple as lifting the car, the car generally runs on the lower flange I-beams. Can bridge the orbiting overhead, but also suspended in underpasses along the orbit, which is called the crane girder suspension cranes. Metallurgy bridge crane in the steel production process can participate in a particular process operation, its basic structure and general overhead crane similar, but lifting a small car is also equipped with special work mechanism or device. Working features of this crane is the use of frequent, harsh conditions, high operating levels. Check item bridge crane safety inspection in order to ensure the safe operation of the bridge crane, crane operation required during some routine security check on the project and points are as follows: (1) lifting height limiter, travel limit switches and various interlock mechanism normal performance, safety and reliability. (2) comply with the safety requirements of the main components: an opening to increase less than 15% of the original size, the torsional deformation of less than 10%; plate hook bushing wear less than 50% of the original size, the board hook spindle wear less than 5%, no peeling , burrs, welding. Hanger hooks and pulleys no obvious defects. Wire rope surface abrasion, corrosion of less than 40% of the diameter of the wire, broken wire in a twist from the wire within less than 10% of the total number of non-breakage double girder crane total distribution, no thinning, no core prolapse, dead twist twist, extrusion, annealing, burning phenomenon. Rope end connections and fixing clips, clips, wedge block connections are intact, no loose, plate no less than two, no less than three catches. No crack reel double girder crane, connections, fixed no loose; wear tube wall thickness of less than 20% of the original; secure volume of not less than two laps, drum and rope diameter ratio meets the requirements. Balance wheel fixed intact, rope shall comply with the requirements. Brake no cracks, no loose, no serious wear, brake clearance on both sides equal right size, there is sufficient braking force, the brake band wear less than 50% of the original thickness. By conventional overhead crane safety inspection, to prevent personal injury to reduce equipment accidents, improve equipment operation rate, reduce maintenance costs etc played a significant role. Super hoist double girder cranes, double girder crane Zunyi, 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!