Liquid pressure leakage detecting system for double-layer lining of underground oil tank of filling station

Abstract

The invention relates to a liquid pressure leakage detecting system with a single-layer oil tank transformed into a glass fiber reinforced plastic double-layer lining, aims to solve the technical problem about improvement of the sensitivity and the reliability of liquid pressure leakage detection, and belongs to the technical field of transformation of the lining of an underground oil tank of a filling station. The system is characterized in that a through middle gap layer of the double-layer lining is filled with a leakage detecting liquid, the pressure of the leakage detecting liquid of thethrough middle gap layer is increased by a pressurizing pump, and the hydrostatic pressure of the through lowest point of middle gap layer is 13 kPa and above higher than the stored liquid maximum pressure of the lowest point of an oil storage tank and the underground water maximum pressure of the lowest point of a storage tank, so that the sensitivity and the monitoring reliability of the leakagedetecting system are improved. Once inner-layer and outer-layer glass fiber reinforced plastics leaks, the liquid pressure of the detecting system can be reduced quickly; and the liquid pressure leakage detecting system for the double-layer lining is simple in structure, high in leakage judgment sensitivity and higher in monitoring reliability.

Description

technical field [0001] The invention belongs to the technical field of lining transformation of buried oil tanks in gas stations, and relates to a leakage detection system for buried oil tanks in gas stations, in particular to a method for transforming buried single-layer oil tanks in gas stations into double-layer glass fiber reinforced plastics Lined liquid pressure leak detection system. Background technique [0002] At present, there are more than 100,000 gas stations and 400,000 oil storage tanks in China. Most gas stations use single-layer steel horizontal buried oil tanks, and most of them have been used for more than 10 years. Steel oil tanks are buried in the ground all year round, and are prone to corrosion and leakage, causing soil and groundwater pollution. Double-layer oil tanks can effectively solve the leakage of underground oil storage tanks and protect the safety of ground water. At present, the commonly used double-layer oil tank technology at home and ab...

AI Technical Summary

Problems solved by technology

When leakage occurs in underground oil storage tanks in gas stations, the amount of leakage is generally small and difficult to detect. Leakage detection using liquid level changes has low sensitivity and poor reliability. A leak detection hole is opened on the top of the tank to increase the risk of leakage, and a monitoring well needs to be excavated on the detection hole, which increases the difficulty and risk of construction

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