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Nondestructive testing method of furnace body lining based on impact elastic waves

An impact elasticity, non-destructive testing technology, applied in the use of sonic/ultrasonic/infrasonic waves to analyze solids, measurement devices, and the use of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as non-destructive testing of difficult furnace linings, and achieve the effect of ensuring objectivity

Active Publication Date: 2018-05-22
四川升拓检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a non-destructive testing method for furnace lining based on shock elastic waves, so as to solve the problem in the prior art that it is difficult to accurately perform non-destructive testing on furnace lining, and to achieve the purpose of providing sufficient basis for judging the state of furnace lining

Method used

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  • Nondestructive testing method of furnace body lining based on impact elastic waves
  • Nondestructive testing method of furnace body lining based on impact elastic waves
  • Nondestructive testing method of furnace body lining based on impact elastic waves

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Embodiment 1

[0031]The non-destructive testing method for furnace lining based on shock elastic waves includes the following steps: (a) determining the position of the measuring point and the excitation position on the surface of the furnace body; (b) installing a sensor at the position of the measuring point, and installing an excitation device at the excitation position ; start the vibration excitation device to excite vibration, collect the vibration signal through the sensor; (c) analyze the vibration signal, save the analysis conditions and analysis results; (d) adopt the same vibration excitation device, after a period of time, in the step ( Steps (b) to (c) are repeated at the same measuring point position and excitation position in a), and the analysis is carried out using the same analysis conditions as in step (c); (e) trend analysis results obtained at different times Through the analysis, the change trend of the lining thickness of the furnace body can be obtained, and the safet...

Embodiment 2

[0033] Based on the shock elastic wave-based nondestructive testing method for furnace body lining, on the basis of Example 1, the analysis in step (c) includes: correlation analysis with vibration signals as basis functions, fast Fourier analysis, and maximum entropy analysis. The analysis includes calculating characteristic parameters in correlation analysis, fast Fourier analysis, and maximum entropy analysis with the vibration signal as the basis function. The characteristic parameters include one or more of detection items, measuring point locations, test date, analysis date, number of vibrations, and statistical parameters of data obtained from different vibration times for each test. The number of excitations in the characteristic parameters includes each excitation: the maximum amplitude of the excitation signal; the first half-wave time of the excitation signal, the moment corresponding to the highest order in the fast Fourier analysis, and the second highest level of ...

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Abstract

The invention discloses a nondestructive testing method for a furnace body lining based on impact elastic waves. The nondestructive testing method for the furnace body lining based on the impact elastic waves comprises the following steps: (a) determining a measuring point position and an exciting position on the surface of a furnace body; (b) mounting a sensor at the measuring point position andan excitation device in the exciting position; starting the excitation device to excite and collecting vibration signals through the sensor; (c) analyzing the vibration signals and saving analysis conditions and an analysis result; (d) using the same excitation device, repeating the steps (b) to (c) in the same measuring point position and excitation position in the step (a) after a period of time, and using the same analysis conditions in the step (c) to perform analysis; (e) performing trend analysis on the analysis result obtained at different times to obtain change trends of the thicknessof the furnace body lining so as to judge the safety of the furnace body. The nondestructive testing method for the furnace body lining based on the impact elastic waves disclosed by the invention isused for solving the problem of difficulty in accurately performing non-destructive testing on the furnace body lining in the prior art, so as to provide a sufficient basis for judging the state of the furnace body lining.

Description

technical field [0001] The invention relates to the field of furnace body detection, in particular to a furnace body lining non-destructive detection method based on shock elastic waves. Background technique [0002] Blast furnace is an important link in steel production, and its safety status is of vital importance. During the production process, due to the flow of molten iron, slag and other molten materials, the lining of the blast furnace will be eroded, making the thickness of the lining gradually thinner. At the same time, due to temperature changes in the furnace and other reasons, radial and circumferential cracks may also occur inside the lining, which will intensify the erosion process of the lining. When the erosion of the furnace lining reaches a certain level, not only the heat insulation performance of the furnace lining will be reduced, but fuel consumption will be increased. In severe cases, the furnace shell may be burned through, causing extremely serious ...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01B17/02
CPCG01B17/025G01N29/045G01N2291/02854G01N2291/0289G01N2291/044G01N2291/045
Inventor 吴佳晔
Owner 四川升拓检测技术股份有限公司
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