Rail-mounted distance measuring device capable of being prevented from falling from rail

Abstract

The invention relates to a rail-mounted distance measuring device capable of being prevented from falling from a rail. The rail-mounted distance measuring device comprises a distance measuring instrument and a mechanism preventing falling from the rail; the distance measuring instrument comprises a distance measuring wheel and a counting instrument; the mechanism preventing falling from the rail comprises a rail-mounted support and guiding assemblies; the rail-mounted support comprises a horizontal fixing plate and a vertical fixing plate, wherein the inner side of the vertical fixing plate isprovided with a limiting assembly; the limiting assembly comprises a plurality of limiting pulleys, the limiting pulleys are tightly attached to the side face of the steel rail to control the distance measuring wheel to travel in the traveling direction of the steel rail, the limiting pulleys do not make contact with a rail web, and thus the distance measuring wheel can pass through a bifurcatedarea smoothly; the guiding assemblies are arranged on the front part and the rear part of the distance measuring wheel to assist the distance measuring wheel in traveling more smoothly on the steel rail; and the limiting assembly can be adjustably fixed on the vertical fixing plate through bolts, the height of the limiting assembly can be adjusted according to actual needs, meanwhile the transverse length of the limiting assembly can be changed by adjusting the bolts and nuts, and then the limiting assembly adapts to steel rails of different specifications. The length of the steel rails can beaccurately measured in railway engineering, and the situation that during measuring, the distance measuring wheel slides, and then the rail-mounted distance measuring device deviates from the steel rail traveling direction is prevented.

Description

technical field [0001] The invention relates to the technical field of railway engineering measurement, in particular to a track distance measuring device for preventing falling off. Background technique [0002] Railway engineering surveying is the surveying work for the survey, design, construction and operation management of railway engineering. Railway engineering measurement is one of the most basic and critical links in railway engineering, so it is particularly important. [0003] The traditional measurement mode mostly uses a tape measure or a track rangefinder to measure. In the tape measure mode, due to the different accuracy and material of the tape produced by different manufacturers, the degree of expansion is different. During the measurement process, the force of pulling the ruler will be different There is no small effect on the measurement results, and after multiple pulls the ruler will become longer and the reading will be inaccurate. Secondly, there are...

AI Technical Summary

Problems solved by technology

[0003] The traditional measurement mode mostly uses a tape measure or a track rangefinder to measure. In the tape measure mode, due to the different accuracy and material of the tape produced by different manufacturers, the degree of expansion is different. During the measurement process, the force of pulling the ruler will be different The measurement results have a big impact, and the ruler will become longer after multiple pulls, and the reading will be inaccurate

Secondly, there are too many human factors involved. The common tape measure commonly used for measurement is mostly 50 meters or 100 meters. There will be human errors in each ruler’s rise and fall and reading. The interval ranges from 600-1000 meters for each track section, and multiple cycles of footage are required. It can only be completed, the ratio of the data obtained after the accumulation of multiple errors to the actual distance is very likely to exceed the limit

[0004] Although the track rangefinder can continuously walk and count, it is also greatly affected by human factors. Walking on the rail is easy to take an S-curve and fall down. If the downforce is too small, rolling may occur. These situations Both will affect the counting of the range finder, and the reading error will be greater when passing the rail gap or bumping in the fork area

[0005] There is another invention with the publication number 201720104025.5, which discloses a wheel-type rail length measuring device. The rail length is measured by a set of distance measuring wheels stuck on the rail waist. This device can only be used for straight rails. , if encountering rail gaps or bumps in the fork area, the device is difficult to pass through, and the data measured by the distance measuring wheels on the left and right sides in the non-straight track section are not uniform, and the reading error is large

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