Definition and classification of gantry cranes

(1) Definition of multipurpose gantry crane, commonly known as gantry crane, gantry crane. Generally used for project installation projects, such as large equipment, but require a wide space. Its structure is as the word says, like a gantry, with the track laid flat on the ground. The old-fashioned one has motors at both ends to drag the crane back and forth on the track. In order to make the installation more accurate, many gantry cranes also use variable frequency motors and servo drives.

Classification and use of sevencrane multipurpose gantry crane wholesale can be classified according to the door frame structure form, main beam form, and main beam structure.

According to the classification of door frame structure, gantry cranes are divided into full gantry cranes and semi-gantry cranes. The main beam of the full gantry crane has no overhang, and the trolley moves within the main span. The legs of semi-gantry cranes can be high or low, which can be determined according to the civil engineering requirements of the site.

2. According to the main girder form,top choice for industrial multipurpose gantry crane is divided into single main girder and double main girder. Among them, single main girder gantry crane has a simple structure, is easy to manufacture and install, has a small mass, and the main girder is mostly a deflection frame structure. Double main girder gantry cranes have strong load-bearing capacity, large spans, good overall stability, and many varieties. However, compared with single main girder cranes with the same lifting capacity, their own mass is larger and the cost is higher. According to the different main beam structures,CE approved multipurpose gantry crane for sale can be divided into two forms: box beam and truss. Generally, box-type structures are used.

3. According to the main beam structure classification,european standard multipurpose gantry crane suppliers is divided into truss beam, box beam and honeycomb beam. Among them, the truss beam is a structural form welded with angle steel or I-beam steel. It has the advantages of low cost, light weight and good wind resistance. However, due to many welding points and the defects of the truss itself, the truss beam also has large deflection and low stiffness. , the reliability is relatively low, and it requires frequent detection of solder joints and other shortcomings. It is suitable for sites with lower safety requirements and smaller lifting capacity. Box beams are made of steel plates welded into a box structure, which has the characteristics of high safety and high stiffness. Generally used for large-tonnage and ultra-large-tonnage gantry cranes. Box beams also have the disadvantages of high cost, heavy weight, and poor wind resistance. Honeycomb beam refers to an “isosceles triangle honeycomb beam”. The end face of the main beam is triangular, there are honeycomb holes on the oblique webs on both sides, and there are chords on the upper and lower parts. Honeycomb beams absorb the characteristics of truss beams and box beams. Compared with truss beams, they have greater stiffness, smaller deflection, and higher reliability. However, due to the use of steel plate welding, the self-weight and cost are slightly higher than that of truss beams. It is suitable for sites or beam sites with frequent use or heavy lifting capacity.