The gantry crane is an upgraded variant of the bridge crane. The Hefei gantry crane is mainly suitable for outdoor cargo yards or open storage warehouses, material storage yards, bulk cargo loading and unloading, railway freight terminals, port terminals, etc. The door frame has two legs installed under the load-bearing main beam, and can directly walk on the ground on the track, and the two ends of the main beam can have elongated cantilever beams.Overhead gantry for sale from China manufacturers
The gantry crane has the advantages of high site utilization, wide operating range, wide adaptability and strong versatility. Widely used in port yards.
A variety of special hooks can also be used for a variety of special operations. The crane consists of a bridge, a trolley operating mechanism, a trolley and electrical appliances. The Hefei gantry crane adopts a box-type double-beam welding structure, and the driving mechanism is driven separately, and both are operated in the control room. The electrical form of the crane is divided into two types: cable and sliding.
Classification of gantry cranes:
First, press the door frame structure.
1. Full gantry crane: the main beam has no overhang and the car is in the main span.
2. Semi-gantry crane: The height of the legs is high or low, which can be determined according to the civil requirements of the site.
Third, double cantilever gantry crane: It is a common structural form, its force structure is reasonable, and the field use area is large.
4. Single cantilever gantry crane: This structure is usually chosen due to site restrictions.
Second, the main beam structure
1, truss beam
The welded steel or I-steel structure has the advantages of low cost, light weight and good wind resistance. However, due to the large number of truss welded joints and their own defects, the truss beams also have the disadvantages of large deflection, low rigidity and low reliability. Suitable for places with low safety requirements and low lifting capacity.
2, box beam
The steel plate welded box structure has the characteristics of high safety and high rigidity. Generally used in large tonnage and super tonnage gantry cranes. Box girder also has the disadvantages of high cost, self-importance and poor wind resistance.600t Gantry Crane
Third, the main beam form
1. Single main beam
The single-girder gantry crane has a simple structure, convenient manufacturing and installation, and its own small quality, and the main beam is mostly a derailer frame structure. Compared to the double girder gantry crane, the overall stiffness is weak. Therefore, this form can be employed when the weight Q is less than 50 t and the span S is less than 35 m. The one-legged gantry crane legs are available in two L and C styles. L-type manufacturing and installation is convenient, the force is good, its own quality is small, but the space for lifting goods through the legs is relatively small. The C-shaped legs are formed in a slanted or curved shape to provide greater lateral space for the cargo to pass smoothly through the legs.
2, double main beam
The double-beam gantry crane has the characteristics of strong bearing capacity, large span, good overall stability and many varieties, but its single-mass gantry crane with the same quality as the lifting weight is larger and the cost is higher. According to the main beam structure, it can be divided into box girder and truss. A box structure is generally used.