Power station boiler heating surface pipe outer diameter creep detector and creep measuring method

Abstract

The invention relates to a power station boiler heating surface pipe outer diameter creep detector and a creep measuring method. According to the technical scheme, the device comprises a positioning sleeve and a measuring sleeve; positioning mechanisms for adjusting the axis position of the positioning sleeve are uniformly distributed in the circumferential direction of the positioning sleeve; a distance measuring sensor is fixed on the inner wall of the positioning sleeve right above the ejector rod of each positioning mechanism; a pressing screw rod is screwed on the side wall of the positioning sleeve under each positioning mechanism; the top surface of the positioning sleeve is provided with a closed annular track; and the measuring sleeve is rotatingly disposed on the annular track. According to the invention, the distance between the inner wall of the positioning sleeve and the outer wall of a to-be-measured pipeline is measured through the distance measuring sensor, and the ejector rod is driven by a motor to stretch out and draw back, so that concentric arrangement of the to-be-measured pipeline and the positioning sleeve is realized; through cooperation of the measuring sleeve and the annular track at the top of the positioning sleeve, measurement of the measuring rod in the circumferential direction of the to-be-measured pipeline is achieved; And the actual outer diameter of the pipeline to be measured is directly measured through the displacement sensor, and therefore 360-degree rapid measurement of the creep of the outer diameter of the pipeline is achieved.

Description

technical field [0001] The invention relates to the technical field of supervision and inspection of heating surface tubes of power plant boilers, in particular to a creep variable detector and a creep variable measuring method for the heating surface tubes of power plant boilers. Background technique [0002] The heating surface tubes of power plant boilers have been serving in harsh environments for a long time, and their strength and other properties will gradually decrease. The overheating and overheating that occurs when the boiler operation is poorly controlled will exacerbate this phenomenon. When the remaining strength of the heating surface tubes is not enough to carry When the internal high-temperature and high-pressure steam acts, creep, expansion, coarse deformation will occur, and even lead to leakage and explosion accidents, seriously affecting the safety and reliability of the unit. Therefore, measuring the outer diameter creep of the heating surface tube is t...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a creep detection instrument and a creep measurement m

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