Ship lift guide rail parallelism measurement method

Abstract

The invention relates to a method for measuring the parallelism of guide rails of a ship lift. Two laser displacement gauges are fixed at positions corresponding to the rail surfaces on both sides of each guide rail on a ship-carrying box, and an electric measurement method is used to measure the distance between the laser displacement gauges and the rail surface. Using the principle that the distance between the rail surfaces on both sides of the guide rail and the sum of the measured distances of the two laser displacement meters is fixed, the data of the two laser displacement meters can be obtained through the whole process of running up and down the cabin, and the distance between the rail surfaces on both sides of the guide rail can be obtained. The distance change, that is, the parallelism of the guide rails. Using this measurement method, the parallelism of the whole guide rail can be accurately obtained, which provides a scientific basis for the evaluation and processing of guide rail installation accuracy.

Description

technical field [0001] The invention relates to a measurement method, in particular to a method for measuring the parallelism of guide rails of a ship lift, which belongs to the field of engineering measurement. Background technique [0002] The ship lift is a kind of navigable structure with mature technology and certain advantages. It has the outstanding characteristics of adapting to high water head, fast dam crossing speed, and low water consumption. It has been widely used and developed rapidly in the navigation of high dams in my country. There are many types of ship lifts. The types commonly used in current projects include wire rope winch vertical lift type, rack and pinion climbing type, and hydraulic type. The single-stage maximum lifting height is 127m; the Three Gorges long nut post short screw rack and pinion climbing ship lift has a maximum lifting height of 113m; Jinghong hydraulic ship lift has a maximum lifting height of 67m. Regardless of the type of ship ...

AI Technical Summary

Problems solved by technology

However, the guide rail is tens of meters short and more than a hundred meters long. The installation accuracy is generally required to meet the deviation of ±5mm. However, after the construction is completed, how to measure and evaluate the installation accuracy of the guide rail with a length of tens to hundreds of meters is very difficult.

Under normal circumstances, the method of pendant hammer is used to check the guide rail, because the distance is too long, the hammer line is affected by various factors, the measurement accuracy is greatly reduced, and only a limited number of sections can be selected for rough review, which is difficult to grasp Therefore, it is necessary to propose a method for measuring the parallelism of the guide rails, which can accurately and continuously measure the parallelism of the guide rails, and provide a scientific basis for the installation accuracy of the guide rails and the necessary local treatment.

Images