The traditional rail fixing technology is a hard fixed rail installation process in which the crane rail flat bar is directly laid on the bottom of the track groove, and the pressure plate is directly fixed on the embedded bolt. This connection method has disadvantages such as unevenness of the track groove bottom. The new technology of crane rail flat bar fixed welding has solved the shortcomings of the traditional rail fixing technology in use. The new technology of crane rail flat bar fixed welding requires that the crane rail flat bar be welded end to end to form an integral track, eliminating the vibration generated by the rail interface. The steel rail is fixed by the steel rail elastic platen. The 9100 series of pressure plate used with the QU100 rail consists of a pressure plate base, a pressure plate clamp, a high-strength bolt, a nut and a flat washer. The long groove formed on the upper side of the pressure plate clamp can adjust the pressure plate clamp laterally to ensure the straightening of the steel rail and the fitting contact between the pressure plate clamp and the steel rail, and the fixed steel rail of the lateral steel to steel. The high-strength rubber nose in the front section of the platen clamp presses the rail with its elastic force in the vertical direction, and the wheel is loosely broken by the generated bow wave. The rubber nose can also absorb the stress in the axial direction of the rail, so that the pier rail can be in the form of a long rail. A continuous steel backing plate is placed between the rail and the bottom of the track groove, and is fixed by anchor bolts and high-strength cement underneath. The method enhances the lateral stiffness of the rail fixing system and the bearing capacity of the rail. Due to the complete contact between the cement and the steel backing plate, the steel backing plate uniformly transmits the wheel pressure to the cement and the track bottom foundation, thereby eliminating the damage of the concrete at the bottom of the track groove.
The track structure of the new technology of rail fixed welding consists of foundation, cement, pressure plate assembly, QU100 rail, embedded bolts, steel backing plate, adjusting bolts and so on. The QU100 rail installation process includes inspection of pre-embedded bolts, installation of steel backing plates, welding of press plate bases, installation of rails, installation of platen clamps, welding of rail joints, tightening of plate clamps and adjustment of rails, and filling of cement. If it is a new project, the embedded bolts can be used directly. The steel backing plate is made of 20mm thick Q235 steel plate according to the drawings. The flatness is ≤1‰, and the position of the bolt hole embedded in the steel backing plate is determined by field measurement. The surface of the steel plate that is in contact with the rail is rust-proof and brushed with anti-rust paint. Before installing the steel backing plate, the loose concrete in the track groove should be cut and the floating ash should be removed and the water accumulated. Install the backing plate as required by the drawing. Use the adjustment adjustment bolts and the pre-embedded bolts to level the steel backing plate. The flatness of the steel backing plate is directly related to the quality of the installation. To reduce measurement errors, try to reduce the height of the instrument.
Compared with the traditional rail fixing technology, the new technology of rail fixed welding has been reformed from the installation process and the materials used, which can improve the construction efficiency, shorten the construction period, reduce the loss of the crane body, improve the equipment utilization rate, and greatly reduce the dock track and The basic maintenance work effectively guarantees the long-term use of the rails and has obvious comprehensive economic benefits. It is a new rail installation technology worthy of promotion.