Force detector and detection method for stress generated by defferent temp of long rail

Abstract

A force measurer for measuring the stress of long steel rail caused by temp variation is disclosed. Its measuring method includes such steps as fixing a dedicated force measurer to the position of long steel rail to be measured, fixing one end of its measuring rod to a measuring point on steel rail, connecting its another end to the static end of a displacement sensor, connecting the moving end of said sensor to another measuring point on steel rail, connecting the data output line of said sensor to displacement recorder, and measuring.

Description

technical field [0001] The invention relates to a rail stress force measuring device and a detection method, in particular to a force measurement device and a detection method for the stress generated by a long steel rail due to temperature changes under the operation condition of a railway line. Background technique [0002] The detection of long rail stress is of great significance to the production of railway transportation. With the continuous improvement of the running speed of railway trains, the length of welded seamless long rails is constantly increasing. From the original hundreds of meters to several kilometers, tens of kilometers, now hundreds of kilometers of seamless lines have appeared and put into use. With the increase of the length of the seamless line, the long steel rail can no longer freely expand and contract with the change of the ambient temperature, and the stress caused by the temperature change, that is, the temperature force, has an increasing inf...

AI Technical Summary

Problems solved by technology

This is a manual measurement method, which is difficult to achieve automatic detection

[0004] Chinese invention patent 02104896.7 discloses a detection method for the temperature force of long rails in seamless lines. This patent is a detection method for measuring the temperature force of long rails by applying a transverse horizontal force on the long rails. During the detection, the train needs to be interrupted. It is very inconvenient to remove the long rail fasteners

[0005] The above measurement methods all have a common shortcoming, that is, complex preparations are required for each measurement, and the measurement equipment is moved to the railway. The temperature force data of long railway rails can be detected anytime and anywhere, and the continuous change process of temperature force cannot be obtained.

At present, railway engineering departments often measure the temperature of long rails and use empirical formulas to calculate the temperature force of long rails indirectly. Due to factors such as environmental temperature changes and differences in internal and external temperatures of long rails, the data obtained are relatively rough.

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