EXPLOSION-PROOF LIQUID FIRE BARRIER Russian patent published in 2006 - IPC A62C4/00 

FIELD: fire-fighting, particularly liquid fire barriers to prevent fire spreading in systems including combustible and explosion-hazardous working medium.

SUBSTANCE: barrier comprises body divided into receiving and outlet chambers with partition having fire-extinguishing liquid channel. The chambers are provided with inlet and outlet gas flow pipes. Fire barrier also has fire-extinguishing liquid level regulation system, gas-distribution member provided with slots. The fire-extinguishing liquid is filled into the chambers so that fire-extinguishing liquid layer height is less than inlet pipe height. Fire-extinguishing liquid regulation system is located in the receiving chamber. Gas-distribution member is made as a number of cavities isolated one from another and opened to permit gas flow from receiving chamber side. The cavities are closed from outlet pipe side. Each cavity has decreasing height and side faces, which taper towards outlet pipe. Besides, lower part of cavity side faces us provided with vertical plates located from outer side thereof so that side faces of adjacent cavities are connected with each other by means of plates. Profiled bottom of each cavity is concave and defines conical depression. The profiled bottom is provided with gutters spaced from side faces and fastened to the plates to create slots. Each cavity bottom and the plates are located below fire-extinguishing liquid level. Upper face of each plate is connected to upper face of barrier body in point spaced from the receiving cavity. Outlet chamber is provided with partition, which separates outlet chamber interior from outlet pipe to create channel, which communicates outlet pipe with at least one anticyclonic means installed downstream from gas-distribution member. The anticyclonic means has orifices for gas flow and fire-extinguishing liquid passage. The barrier body comprises gas-discharge pipes having outlet orifices closed with blow-out members.

EFFECT: extended range of technical means, increased operational capabilities and convenience, improved operational reliability and safety, even in the case of usage of gas transit means, which provides gas passage through the barrier due to enhanced aerodynamic and thermal regime stabilization in the case of fire and explosion initiation independently of gas concentration by combustion zone refluxing, decrease of transit gas flow during gas flow reversal and reduced pressure along shock wave front, possibility of barrier usage at low temperatures.

5 dwg