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Inspection Measures about 30×50 Crane Rail Quality


Inspection Measures about 30×50 Crane Rail Quality
The quality of the 30×50 crane rail installation directly affects the quality of the crane’s operation. Only by grasping the quality control from the source can the installation quality of the 30×50 crane rail square steel bar be guaranteed. Through the understanding of the 30×50 crane rail installation technology, the inspectors can master the key parts and technical points of the inspection process, and ensure the quality of supervision and inspection.
Span measurement
1.Tension measurement can be carried out with steel tape spring dynamometer.
2.The span should be measured at each column, and the selected points should be corrected by the diagonal method to improve the accuracy of the measurement.
3.The same tension should be used during the measurement and the measurement reading should be corrected.
4.The final measurement reading after the adjustment is completed shall be the official record of the acceptance of the work.
As for orbital straight line measurements, straightness measurements can be made with a theodolite, or can be measured with a steel rule through wire-drawing method, with a minimum of one measurement per span.
Regarding the elevation and level measurement, it is usually measured with a water level gauge. If the elevation line is already drawn on the side of the crane beam, it can be measured with a level gauge and a steel ruler. This method can also be used when the elevation line is marked on the column. When the level is measured for height and level, a scale with a minimum scale of 1 mm is applied and placed straight in the center of the top surface of the 30×50 crane rail. Regarding the 30×50 crane rail joints with the gap and joint offset, the joint gap is measured with a thickness gauge and can also be measured directly with a steel ruler. The deviation of the general joint and expansion joint should be within the allowable range. The joint offset is measured on the measuring surface with a level ruler or a straight ruler, and the offset is measured within the allowable range. The joints of the corresponding rails shall be staggered not less than 600 mm and shall not be equal to the large wheelbase. The joint plate bolts should be used with the joint plate. The welded joints should be smooth and smooth, and there must be no raised welds.
For newly laid 30×50 crane rail, the results of the final inspection shall be recorded in detail and accurately in the installation self-test records as the basis for review and correction. After a certain period of use, it is necessary to check whether it sinks, whether the joint is loose, and whether the track has displacement. If problems are found, it should be sorted out in time. The installation quality of the crane track is the basis of the performance of the crane. It directly affects the operation quality of the crane. Only the inspectors have mastered the key parts and technical points in the inspection process, and the quality is guaranteed from the source to ensure the quality of supervision and inspection of the crane installation.

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