Patent EA-004896-B1 (EA)
Title: Device for combined reactive and passive protection
Inventor: BODROV SERGEY ALEXEEVICH
IPC: F41H5/007
Filed: 2001-06-19
Abstract: 1. A device for a combined reactive and passive protection embodied in the form of an assembly comprises a layer of an explosive agent (3) arranged between two rigid plates (1, 2) and a layer of an inert material (4), characterized in that said layer of the inert material is arranged between the face rigid plate and a layer of the explosive agent, the thickness of the inert layer constitutes 0.1-5.0 of the thickness of the explosive agent, the ratio the thickness of the inert material (4) and the thickness of the rigid plates (1, 2) ranges from 0.4 to 6.0, the inert material (4) is made of a material having a sound speed ranging from 1000 to 3200 m/sec and an acoustic impedance less than the acoustic impedance of the material of at least the plate (2), the layer of the inert material being fitted against the rigid plate (1). 2. The device according to claim 1, characterized in that at least one of its plates is made of a type of steel with a hardness ranging from 285 to 445 HB. 3. The device according to claim 1, characterized in that the layer of the inert material is made of a mixture comprising two or more substances, wherein a polymer material is at least 4% of the total mass. 4. The device according to claim 1, characterized in that the layer of the inert material is a multi layer, at least of two sublayers of inert material. 5. The device according to claim 1, characterized in that additional plates can be disposed on the external surface of the rigid plates, said additional plates having density 1100 to 19530 kg/m<3>, a thickness of the additional plates ranging from 0.2 to 5.0 of the thickness of the rigid plates (1, 2). 6. The device according to claim 3, characterized in that the inert material comprises a substance capable to resist combustion or to suppress burning. 7. The device according to claim 4, characterized in that the inert material layer comprises two layers, one of them is made of polymethylacrylate, and the second from paraffin, cerezyn or the like substance. 8. The device according to claim 4, characterized in that the inert material layer comprises two layers, one of them is capable to expand, when heated, thereby forming a thermoinsulating pad, wherein the material comprises penthaerythrite, polyvinylchloride, silicate lead, epoxy resin and a plasticizer. 9. The device according to claim 5, characterized in that additional plates disposed on the external surface of the rigid plates are made of a material having hardness ranging from 230 to 535 HB. 10. The device according to claim 6 characterized in that the inert material layer comprises synthetic rubber, chalk, kaolin and sulfuric potassium. 11. The device according to claim 6 characterized in that the inert material layer comprises synthetic rubber, chalk and lithopone (a mixture of sulfuric barium and zinc sulphide). 12. The device according to claim 6 characterized in that the inert material layer comprises synthetic rubber, chalk and talc. 13. The device according to claim 6 characterized in that the inert material mixture comprises capsules comprising flame extinguishing composition, the capsules are evenly distributed in the polymer material and comprise water, or tetrafluorodibromoethane, or substituents thereof. 14. The device according to claim 8, characterized in that the material layer capable to expand, when heated, thereby forming a thermoinsulating pad, is disposed on at least one external side of the rigid plates, or on the external side of the additional plates.