Patent ID: 6237694
Filing Date: 2001-05-29
Classification: A62C

Abstract:
An explosion-protecting and extinguishing safety device for an inflammable liquid storage tank, said safety device comprising:at least one aperture located on a top portion of said tank;a switch device for said aperture being controlled by an automatic system, said switch device opening the aperture automatically and releasing a quantity of vapor when the temperature of a wall of said tank exceeds a preset value, the relation defining the safety device being defined by the equation:S.sub.o =1.4 nV(1+K)/liter mm.sup.2where S.sub.o is the cross-sectional area of said aperture; V is the volume of said inflammable liquid storage tank; n is a safety coefficient, n being greater than or equal to one; K is an obstruction parameter of a respective wall of a pillar-shaped pipe located in a flameout device, the piller-shaped pipe being defined by the following relation:H=3D.sub.o (D+1).sup.2 mm, .phi.25 mm<D.sub.o <.phi.25 mm, S/25>S.sub.o >1.4V(1+K)/liter mm.sup.2where H is the height of said pillar-shaped pipe; D.sub.o is the diameter of said pillar-shaped pipe in said flameout device; D is the bore diameter of said aperture; and S is the cross-sectional area of said tank; andsaid flameout device including a plurality of pillar-shaped pipes arranged in parallel with a vapor-out aperture on an upper end of said flameout device, said flameout device being installed vertically above said aperture on said top portion of said tank, the vapor-out aperture having a diameter and a cross-sectional area approximately equal to said tank aperture.