Insulating ruler measuring flatness of working surface of online traffic track and manufacturing method

Abstract

Provided are an insulating ruler measuring flatness of a working surface of an online traffic track, and a manufacturing method. The ruler comprises an aluminum alloy ruler body (1), the outer surface of the ruler body is provided with a nonconductive metal oxide insulating layer (2), the measuring surface of the ruler body is connected with an insulating strip (3), and the ruler body is provided with a graduation scale (4). The manufacturing method of the insulating ruler comprises: putting the aluminum alloy ruler body (1) in a chromate solution for anodizing, forming a layer of AL2O3 on the surface of the aluminum alloy, when direction voltage rises to 750V and temperature is higher than 50 DEG C, an oxide layer on the material surface being broken through, arc strike being generated, and instant high temperature of 2000 DEG C being generated, after high temperature action on an oxide film, organization being changed, a melt forming the metal oxide insulating layer (2) which uses AL2O3 as a matrix, and surface of the metal oxide insulating layer being nonconductive, after that, adhering the insulating strips (3), or connecting the insulating strips (3) on two side measuring surfaces of the ruler body (1) by screws or pins. The manufacturing method is clever and convenient. The anodization method effectively solves a problem of conduction of a metal material, and a metal ruler whose surface is insulated and does not deform is obtained.

Description

technical field [0001] The invention relates to the technical field of a measuring tool for the flatness of a track working surface of an online rail transit and a manufacturing method thereof. Background technique [0002] At present, rail trains run on the rails for a long time, causing wear to the rails, and the subsidence of the ground will also cause uneven deformation of the rails. Track maintenance staff need to regularly check and measure whether the working surface of the rails is straight. Electrified trains are widely used in urban traffic, and the trains run frequently. When the maintenance personnel inspect the rails, when the existing steel rulers for detecting straightness and flatness are placed on the surface of the track in the online state, the steel rulers are conductive. The contact of the track surface will send out a signal of an obstacle on the track, and an alarm will be issued, making the control center mistakenly think that it is the signal transmi...

AI Technical Summary

Problems solved by technology

Electrified trains are widely used in urban traffic, and the trains run frequently. When the maintenance personnel inspect the rails, when the existing steel rulers for detecting straightness and flatness are placed on the surface of the track in the online state, the steel rulers are conductive. The contact of the track surface will send a signal of obstacles on the track and send out an alarm, making the control center mistakenly think that it is the signal transmitted by the train, making wrong judgments, and affecting the normal operation of the train

In addition, when the temperature reaches 40°C in summer, trains frequently pass the rails, and the maximum temperature of the rails can reach 70-80°C. Ordinary steel rulers cannot be measured due to the high temperature of the guide rails.

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