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Currently, most solution for crane rail fixing is designed according to the standard drawing of railroad track. Traditional method of rail connection adopts rail joint bars, but it is better for crane rail to use crane rail fastening system. But why use crane rail fastening? If a crane has very low running speed, low working frequency, and low wheel-pressure, it’s working to adopt traditional rail fixing system. If a crane has high running speed, high working frequency, and high wheel pressure, the traditional fixing system will produce a bad influence on the crane rail. Actually, with the update of technology, the tonnage of crane become more and larger, working frequency also get more and higher. Traditional rail fixing system can’t be adaptable for the requirement of crane development, that’s why knowing crane rail fastening system is important.
Crane rail fastening market
Common problems of rail fastening system for crane rail
- For traditional rail fastening system, rails are connected by the rail joint. There is a joint between two rails, when crane pass through rail joint, strong vibration, the impact will damage the structure.
- Due to the load from the track, track bolt and fish bolt often loose, which need nonscheduled maintenance.
- When rail track is wearing and gnawing, joint will misplace and deform. It is hard to do the lateral adjustment.
- Sometimes, the concrete bed under the rails is broken, the rail joint will sink.
- Part of rail track bends into S-shape curve along the axial line.
- Common rail clips can force the crane rail.
Components of crane rail fastening
Rail rubber pad
Crane clips
Crane rail fastening system has the strict requirement on the clamping force and lateral force of each set of crane clip. Due to the base should bear huge alternating lateral force from tie plate, Crane clip of GANTREX have the high standard of material and welding of base. In general, crane clip adopts forging process, which has good safety, long service life.
Continuous welded rail
Grout
Why use crane rail fastening system to replace traditional rail fasteners?
Obviously, crane rail fastening is more suitable than traditional rail fastening for crane rail fixing. In a word, crane rail fastening system can make up the shortfall of traditional fastening system.- Traditional crane rail fixing is joined by the rail fish plate, there will be a gap between two ends of rails. The rail tracks can’t be connected into a continuous part. The gap will produce vibration when the train passes the rail joint. Frequent vibration will lose the crane bolts and fish bolts, also result in much more other damage to crane or crane rail.
- Crane rail is made by the hot rolling, and rail base usually has an uneven surface. In the primary period, the contact surface between concrete and rail track will be same as rail base. While longitudinal extension of rail track caused by the thermal expansion and contraction will form peak When the crane operates, the pressure crushes the particles. Again and again, the concrete bed will be damaged.
- Traditional rail clips for fixing steel plate is directly on the anchor bolt. The lateral force produced by the crane operation through the anchor bolt and pass to the concrete bed. When the lateral force is much bigger than the ultimate strength of concrete bed, the bed will be broken and anchor bolt will lose.
- When the crane runs along the crane rail track, the end of rail will be left vertically, and large lifting capacity will appear. The lifting capacity can lose or break track bolts.
