In the project, the crane rail installation is in a mechanical field between civil engineering and mechanical engineering. Rail installation is often installed by the plant construction side, and the crane is installed by the crane installation unit, the two are often out of touch. In the construction of the installation rails, rail beam and crane track installation is often completed by two professional (such as civil and mechanical installation), the two professional also exist between the out of touch. Therefore, the quality of the crane track installation is difficult to really guarantee.
The installation of the crane track directly affects the running quality of the crane.
Crane rails
Crane running rails have crane rails, railroad rails and square steel. The top of the rail is convex, the bottom is a flat plate with a certain width, increasing the contact surface with the foundation; the cross section of the track is mostly shaped, with good bending strength. Square steel can be seen as flat-top rail, due to the wheel wear, generally only used for smaller, slower, less frequent work of the crane. The rail is usually made of carbon and manganese with higher steel (C = 015% ~ 018%, Mn = 016% ~ 115%). The typical material for the crane track is U71Mn steel. Square steel is mainly made of Q275 square steel or flat steel.
Crane rail is used for cranes and small cars with special cross-section rails, the standard length of 9,915,10,1015,11,1115,12,1215 and other 8 kinds. Common specifications are QU70, QU80, QU100, QU120, QU The following numbers indicate the track head width. Rail rail sub-rail and light rail 2, rail specifications with a nominal weight per meter expressed. Weight greater than 30kg / m of the rail, are heavy rail. Standard rail length of 12150m and 25100m2 kinds of specifications. The amount of light rail is not greater than 30kg / m of the rail, usually 5 ~ 12m in length. Light rail steel, mostly ordinary carbon structural steel cast steel and semi-killed steel, in order to improve the wear resistance and corrosion resistance of steel, in recent years, Mn, Si, P and other alloy elements of low-alloy structural steel.
Crane rail installation
overhead crane Rail Installation
There are two kinds of rails beams used to install the track: one is steel beam, one is concrete prefabricated beam. The concrete prefabricated beam must be left with an embedded hole for installation with bolts, or in concrete
Prefabricated bolts in prefabricated beams. The installation method of the crane track is fixed with the pressure plate, the hook screw is fixed, the welding and the bolted joint are fixed. In order to adjust the horizontal direction, the holes in the rail platen are usually made of long holes, and the vertical adjustment can be padded under the rail. Track plate in the design, to have sufficient rigidity, each plate, according to the size of the force can be made of single or double hole. Only the track and the track beam or rail beam fixed steel plate with welding connection, the car can be welded in the track.
Rail laying before the installation of the rail beam requirements
gantry crane Rail Laying Installation
Requirements for concrete track beams
- The track beam must be made to ensure that the position of the bolt holes in the transverse and longitudinal direction of the beam is less than or equal to 5 mm. The diameter of the bolt holes is 2 to 7 mm larger than the bolt diameter, and the top surface of the beam is flat Wiping smooth.
- The installation of rail beam deviation must meet the following requirements, or to adjust the track beam after allowing concrete leveling.
- The center of the beam position on the design of the positioning axis deviation ≤ 5mm.
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