Nondestructive quantitative detecting method and device for internal defects of refractory brick

Abstract

The invention relates to a nondestructive quantitative detecting method and a device thereof for internal defects of a refractory brick. The detecting method comprises the following steps of: adopting a striking mode to excite the refractory brick (1); taking acoustic and vibration characteristics of the refractory brick as internal quality state quantitative parameters; recording the acoustic and vibration characteristics measured in striking; converting the acoustic and vibration characteristics into electrical signals; analyzing corresponding electrical signals based on spectral technology; and comparing analysis results with a standard spectrogram of the refractory brick so as to realize nondestructive quantitative detection of internal defects. The device comprises a striking tool, a detecting system and a display memory system, wherein the detecting system comprises a sensor (2), a conversion device (3) and a spectrum analysis block (4), and the display memory system (5) includes a spectrum display, a memory and an output interface. The invention can replace an X-ray method, reduce the detection cost, achieve on-line monitoring and quantitatively express whether the quality is qualified or not, has simple structure, reliable performance, high efficiency and easy operation, and can realize the nondestructive quantitative detection of refractory materials, ceramics and the like.

Description

technical field [0001] The invention relates to a refractory material detection method, in particular to a non-destructive quantitative detection method and device for internal defects of refractory bricks. Background technique [0002] Refractory bricks are refractory materials with a certain shape and size. According to the preparation process, it can be divided into fired bricks, unfired bricks, fused bricks (fused cast bricks), refractory and heat-insulating bricks; according to the shape and size, it can be divided into standard bricks, ordinary bricks, special bricks, etc. It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures. It is widely used in modern large-scale industrial production such as metallurgy and building materials. [0003] The existence of internal defects shortens the service lif...

AI Technical Summary

Problems solved by technology

In the existing engineering practice, when the quality requirements of refractory bricks are very strict, the use of X-ray irradiation inspection piece by piece or ultrasonic flaw detector inspection is insufficient in both instrument operation and inspection cost, and it is difficult to quantify whether the quality meets the requirements; In normal production, experienced personnel are usually sent to detect the sound obtained by tapping refractory bricks with a small hand hammer, which stays in the perceptual stage, and disputes often arise between the supplier and the purchaser for quality identification, which causes inconvenience to production

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