Acoustic emission detection device and method for detecting bottom of storage tank in confined space

Abstract

The invention discloses an acoustic emission detection device for detecting the bottom of a storage tank in a confined space. The acoustic emission detection device comprises a plurality of acoustic emission sensors uniformly arranged on the same circumference of the wall of the storage tank, explosion-proof cable devices connected with the acoustic emission sensors respectively, an acoustic emission host electrically connected with the explosion-proof cable devices, a computer electrically connected with the acoustic emission host, and a lead refill, wherein the computer is used for receiving signals of all the acoustic emission sensors, which are processed by the acoustic emission host and judging the situation that the acoustic emission sensors detect the bottom of the storage tank in the area; and the lead refill is broken on the wall of the storage tank and gives out a breakage signal to serve as an analog source capable of repeatedly sending elastic waves, so as to achieve calibration of the acoustic emission host, channel sensitivities of the explosion-proof devices and attenuation measurement and positioning. The acoustic emission detection device provided by the invention can achieve nondestructive detection on the bottom of the storage tank without influencing the normal operation of the storage tank, and has the advantages of high security, good economical efficiency and reliable detection result.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to a safety protection method and an appliance for acoustic emission detection of a storage tank bottom in a confined space. Background technique [0002] In the scrambling reserve of global petroleum strategic resources, oil storage tanks are widely used. With the increase of service life, the problem of oil tank leakage becomes more and more serious. Oil tank leakage not only causes oil loss and energy waste, but also brings fire, explosion, pollution and other dangers. According to the data, it is found that the corrosion of the bottom plate of the storage tank is the most serious during the inspection of the storage tank. Therefore, the focus of storage tank corrosion detection and maintenance is generally on the bottom plate. my country's traditional tank bottom defect detection uses regular off-line non-destructive testing. The inspection proces...

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Problems solved by technology

Oil tank leak detection technologies mainly include tracer method, resistance leak detection method, ultrasonic leak detection method, mass balance leak detection method, foundation soil sample analysis method, etc. Yes: The structure of the tank chamber is complex, the space is limited, the drilling technology is complicated, and there is no similar technology research base in China, and there are no corresponding regulations and standards

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