Ultrasonic flaw detection method of scraper circular chains

A circular chain and ultrasonic technology, which is applied in the direction of using ultrasonic/sonic/infrasonic waves, using sonic/ultrasonic/infrasonic waves to analyze solids, measuring devices, etc., can solve problems such as ring chain breakage accidents

A circular chain and ultrasonic technology, which is applied in the direction of using ultrasonic/sonic/infrasonic waves, using sonic/ultrasonic/infrasonic waves to analyze solids, measuring devices, etc., can solve problems such as ring chain breakage accidents

CN102183580AInactive Publication Date: 2011-09-14SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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  • Ultrasonic flaw detection method of scraper circular chains
  • Ultrasonic flaw detection method of scraper circular chains
  • Ultrasonic flaw detection method of scraper circular chains

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Experimental program
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Effect test

Embodiment Construction

[0024] Such as figure 1 , 2 As shown, the specific steps of an ultrasonic flaw detection method for a scraper circular link chain are:

[0025] 1. Run the scraper conveyor at a low speed, the speed can be 0.3~0.5m / s;

[0026] 2. Turn on the flaw detector, turn on the water supply switch of the special probe, and supply water to the probe;

[0027] 3. Use a special probe to slide through the straight section of each circular chain with a weld in turn, and observe the echo at the specified position.

[0028] 4. According to the standard sample, determine the relationship between echo height and crack depth, and determine the echo height alarm threshold; when the observed echo height is higher than the alarm threshold, an alarm will be prompted; when When it is lower than the alarm threshold, no alarm is given, so as to realize accident prevention warning.

[0029] Such as figure 2 , 3 As shown in , 4, the special probe for realizing the scraper ring chain ultrasonic flaw ...

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Abstract

The invention provides an ultrasonic flaw detection method of scraper circular chains and relates to a mining scraper conveyor. By the method, the problem that breaking accidents of circular chains of the conventional scraper conveyor occur frequently and cannot be prevented is solved. The method particularly comprises the following steps of: 1, operating the scraper conveyor at a low speed of 0.3 to 0.5 m / s; 2, starting a flaw detector and turning on a water supply switch of a special probe to supply water for the probe; 3, using the special probe to slide through a straight section, with weld joints, of each circular chain sequentially, and observing echo of a set position; and 4, comparing with echo generated by a standard sample and calculating flaw depth, wherein a warning threshold value is determined by the standard sample, so that accident preventing warning is realized. By the method, the flaw depth can be calculated according to the echo generated by the standard sample and the echo generated by flaw detection of the actual circular chains and a flaw detection operator sends out fault warning, so that the circular chain breaking accidents of the scraper conveyor are avoided.

Description

technical field [0001] The invention relates to a mining scraper conveyor, in particular to a non-destructive flaw detection of a scraper circular link chain. Background technique [0002] The scraper conveyor is a commonly used pivotal equipment in coal mine production. Whether it works normally or not plays a vital role in the safe production of the entire coal mine. However, at present, during the operation of the scraper conveyor, there are often breakage accidents of the circular link chain. Every time there is a broken chain, if the shutdown is not timely, it will also cause piles of chains and coals, causing the entire working face to stop production and causing huge economic losses. Statistics show that the broken chain accident of scraper conveyor accounts for about 52.12% of the total number of scraper conveyor failures. Therefore, it is particularly important to analyze the cause of the broken chain accident of the scraper conveyor and prevent it. [0003] Acco...

Claims

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Application Information

Patent Timeline
14 Sep 2011
Publication
CN102183580A
IPC
G01N29/04; G01B17/00
Inventors
梁义维; 白宏峰