Patent ID: 8511505

Claim:
A safe and environmental protection type underground oil tank, comprising a tank body of two-layer structure comprising an inner tank wall and an outer tank wall, an interlayer space formed between the inner tank wall and the outer tank wall, characterized in that high porous explosion-proof materials in a plurality of units are respectively filled in a cavity of tank body and the interlayer space formed between the two-layer tank walls, an oil leak detection device being provided in the interlayer space between the two-layer tank walls, and an oil spill pool being established on a manhole cover of the tank body, and the bottom of this oil spill pool being in communication with the interlayer space between the two-layer tank walls, wherein said explosion-proof materials filled in the interlayer space of tank body are wrapped around the outer wall of the inner tank body in multiple layers and completely filled in the interlayer space, wherein said high porous explosion-proof materials filled in the inner cavity of the tank body are contained in a plurality of explosion proof units, each of which include a framework defined by angle steels, a mesh fence braided with a steel wire provided outside of the framework, and high porous materials filled in the framework, wherein the plurality of explosion proof units are in different shapes to adapt to different positions in the oil tank in which the high porous explosion-proof materials are filled.