Measurement method for rotary kiln cylinder coaxiality

Abstract

The invention relates to a rotary kiln, particularly to a measurement method for rotary kiln cylinder coaxiality. The measurement method comprises the following steps: step one, before rotary kiln cylinder lifting, using a divider caliper unit to draw four arcs at two ends of each cylinder by using four arc equal division point as circle centers and lengths less than cylinder radius as radius, enabling the arcs to be intersected at four points and using the intersection point of the four points as the center of the cylinder, and then carrying out cylinder lifting work; step two, after completion of the whole cylinder lifting, setting measurement points at Chinese character "mi"-shaped support portions at two ends of each cylinder and respectively setting circular holes used as the centers of the cylinders; step three, erecting an instrument; step four, starting the instrument and calibrating the instrument; and step five, carrying out data reading; to be specific, adjusting the elevation of a theodolite and then measuring circular holes at the Chinese character "mi"-shaped support portions at the two ends of each cylinder, replacing scale plates of the laser theodolite at all circular holes, aligning the center cross curves, and measuring the error between the center cross curves and the laser point to obtain the error of the cylinder coaxiality. With the measurement method, measurement becomes convenient and precise without being influenced by the weather.

Description

technical field [0001] The invention relates to a rotary kiln, in particular to a method for measuring a rotary kiln cylinder body. Background technique [0002] The measurement of the concentricity of the rotary kiln shell is an important step in the inspection of the installation of the rotary kiln shell. The quality of the concentricity directly affects the use of the rotary kiln. The greater the deviation of the concentricity, the shorter the service life of the rotary kiln . In the past, the measurement of the coaxiality of the rotary kiln mostly used the steel wire method, which was divided into the central target method and the outside wire method. The first center target method is to make two targets on the outer sides of the rotary kiln cylinder according to the design requirements to draw the center line, divide the cylinder into four points, and use a drawing rule smaller than the radius of the cylinder to draw the centerline on the cylinder. Draw four arcs on t...

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Problems solved by technology

The first center target method is to make two targets on the outer sides of the rotary kiln cylinder according to the design requirements to draw the center line, divide the cylinder into four points, and use a drawing rule smaller than the radius of the cylinder to draw the centerline on the cylinder. Draw four arcs on the target board in the middle of the word support at 4 points, and then measure the distance from the four points of each section of the cylinder to the central steel wire to measure the coaxiality of the cylinder; the second method of hanging wires outside the cylinder is in the Draw the steel wire at four points equally on the outside of the first section of the cylinder and the last section of the cylinder, and measure the distance from each section of the cylinder to the steel wire; the first method requires two points at both ends of the cylinder, which increases the measurement time. The error, that is, the instability of the measurement, is greatly affected by the weather; the second method is greatly affected by the material of the cylinder and the weather, and the measurement is difficult and the measurement error is large; therefore, the current measurement method can no longer meet the requirements for installation accuracy at this stage

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