Detection control method for thickness of sprayed material on inner wall of pipeline

Abstract

The invention relates to a detection control method for the thickness of a sprayed material on the inner wall of a pipeline. The detection control method comprises the steps of: 1, regulating a detection control device for the thickness of the sprayed material on the inner wall of the pipeline so that the distance from a hinge point among a first fixing arm, a second fixing arm and a rotating armto the outer end of a fixing plate of a measuring needle is equal to a distance from the hinge point to the outer end of a scraper blade and is equal to the value obtained by dividing the difference of a diameter inside the pipeline and 2H by 2, enabling the distance from the outer end of a first fixed arm measuring needle fixing plate and the outer end of a second fixed arm measuring needle fixing plate to the front end of an adjustable measuring needle to be equal to H, wherein H is a design thickness of the sprayed material on the inner wall of the pipe; fixing the first fixed arm and the second fixed arm at a position with any diameter in the state of intersecting the first fixed arm and the second fixed arm for 180 DEG, detecting and correcting so that the thickness of the sprayed material at the diameter is equal to H; 3, rotating the rotating arm, detecting and scraping redundant sprayed material, recording a detecting result; 4, continuing spraying according to the detection result; 5, repeating the steps 3 and 4 until the thickness is qualified; and 6, taking out the detection control device. The method has the advantages of convenience for use, rapidness in detection, time and labor saving and wide application range.

Description

technical field [0001] The invention belongs to the field of pipeline detection in the metallurgical industry, and in particular relates to a method for detecting and controlling the thickness of paint sprayed on the inner wall of a pipeline. Background technique [0002] In metallurgical system engineering, pipeline insulation can be divided into two types: "external insulation" and "internal insulation". The usual method of "external insulation" is to wrap the outer wall of the pipeline with thermal insulation felt and galvanized iron sheet (or glass cloth) of various properties. The thickness of the outer insulation layer of the pipeline is controlled by the thickness of the thermal insulation felt, which is more convenient. "Inner insulation" is common in large-diameter pipelines, such as various hot air pipelines. The usual method is to use an air compressor to spray paint with various properties in the pipeline, and then build refractory bricks. The thickness of the "i...

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