Detection and release device in storage tank based on acoustic emission technology

Abstract

The invention relates to a detection and delivery device in a storage tank based on acoustic emission technology, which includes an expansion module in the tank, an oil cleaning module, a cable retracting module, a cable correction device, and a support platform. On the module; the end of the aluminum-plastic cable passes through the cable correction device and the oil cleaning module in sequence, and then connects with the expansion module in the tank located under the support platform; the expansion module in the tank includes a casing, a gear set, a pushing disc, and an acoustic emission sensor , Depth gauge; the driving gear of the gear set is fixed on the manual gear switch rod, and the end of the manual gear switch rod passing through the shell is provided with a manual gear switch. The ends of the rods are hinged with a second connecting rod, and the other end of each second connecting rod is connected with an expansion connecting rod, and an acoustic emission sensor is installed at the end of each expansion connecting rod. The invention can receive signals inside the large storage tank, and isolates the interference from the external environment.

Description

technical field [0001] The invention relates to a detection device in a petrochemical storage tank, in particular to a detection and delivery device in a storage tank based on acoustic emission technology. Background technique [0002] During the service process of large atmospheric vertical storage tanks containing oil products, due to the influence of changes in the environment and operating conditions, corrosion defects are easily produced at the welds of the bottom plate of the storage tank. The occurrence and deterioration of these defects will lead to a reduction in the safety performance of the bottom plate of the storage tank. In severe cases, the built-in oil will leak and a major accident will occur, posing a serious threat to the environment, people's lives and property safety. The regular inspection of the weld seam of the bottom plate of the storage tank is one of the important technical guarantee measures for the safe operation of the atmospheric pressure stora...

AI Technical Summary

Problems solved by technology

The occurrence and deterioration of these defects will lead to a decrease in the safety performance of the bottom plate of the storage tank, and in severe cases, the built-in oil will leak and a major accident will occur, posing a serious threat to the environment, people's lives and property safety

The regular inspection of the weld seam of the bottom plate of the storage tank is one of the important technical guarantee measures for the safe operation of the atmospheric pressure storage tank. The sensors are evenly distributed on the outer wall of the storage tank, and determine the corrosion degree of the bottom plate and the approximate location of the defect by receiving the sound waves generated when the corrosion defect occurs on the bottom plate of the storage tank. However, with the continuous development of the petrochemical industry, the storage tank is becoming larger and larger , for these large storage tanks, due to the very long distance from the corrosion acoustic signal to the tank wall sensor, the signal strength is greatly attenuated, which makes it more and more difficult for this traditional detection method based on acoustic emission technology to realize bottom corrosion defects detection

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