RU2513337C1 - Lengthy cumulative charge (krasnov-charge) - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: lengthy cumulative charge of an explosive with a longitudinal groove faced with metal is equipped with two intermediate detonators and two layers of the explosive with high speed of detonation. Intermediate detonators are arranged symmetrically relative to the groove and are made with such shape that their thickness reduces in direction from the rear side of the charge to the frontal one. Each intermediate detonator is installed between the explosive containing the groove and the layer of the explosive with high speed of detonation. Two layers of the explosive with high speed of detonation are arranged at external sides of the charge. Each of the specified layers in the rear part of the charge is connected with the same layer on the other side with a layer-conductor of a detonation wave from the explosive.

EFFECT: higher efficiency of action of a lengthy cumulative charge.

1 dwg

Description

The invention relates to elongated cumulative charges (UKZ) of an explosive (BB) with a longitudinal cumulative recess.

Known elongated cumulative charge (1).

The closest analogue is an elongated cumulative explosive charge with a longitudinal recess lined with metal (2).

The disadvantage of this charge is the fact that the detonation wave excited in it propagates along the UKZ, and the mass velocity vector of the explosion products at the initial moment is parallel to the obstacle plane. Only subsequently the gases in their movement deviate towards the barrier and cumulative extraction as a result of their expansion due to the appearance of a rarefaction wave in the explosion products. While in a classical cumulative charge with an axisymmetric recess, the direction of propagation of the detonation wave is perpendicular to the obstacle plane, and the mass velocity vector of the detonation products is directed immediately with the arrival of the detonation wave perpendicular to the obstacle plane, i.e. in the desired direction of the explosion. For these reasons, the effectiveness of the UKZ is significantly reduced.

The aim of the present invention is to significantly increase the effectiveness of the UKZ.

This goal is achieved in that the elongated cumulative charge of the explosive with a metal lining of the longitudinal recess is equipped with two intermediate detonators located symmetrically relative to the axial plane of the recess and made in such a way that their thickness decreases in the direction from the back of the charge to the front, as well as two layers explosive substances with a high detonation velocity located on the outer side surfaces of the charge, with each intermediate detonator located between ERZHAN recess explosive and the layer of explosive substances with high detonation velocity, said layer in the rear part of the charge is connected to the same layer on the other side of the conductor layer, the detonation wave from the explosive.

This embodiment of the elongated cumulative charge leads to the fact that immediately after the front of the detonation wave incident on the notch, the mass velocity vector of the detonation products has a component directed to the barrier, thereby significantly increasing the efficiency of the UKZ.

The drawing shows a cross section of an elongated cumulative charge (RED-CHARGE).

The device “Elongated cumulative charge (KRASNOV-CHARGE)” consists of a powerful explosive 1 with a high detonation speed, it has a longitudinal cumulative recess 2 with a lining 3 of high-density metal. The charge is equipped with two intermediate detonators 4 arranged symmetrically with respect to the axial plane of the recess 2, made in such a way that their thickness decreases in the direction from the back of the charge to the front. Layers of 5 explosives with a high detonation velocity are located on the outer side surfaces of the charge. These layers 5 are interconnected in the back of the charge by the detonation wave conductor layer 6. The conductor layer 6 is made in a shape symmetrical with respect to the axial plane of the recess 2. The detonation velocity of the explosive from which the intermediate detonators 4 are made is significantly lower than the detonation velocity of the explosive layers 5. In this case:

BB 1 - TNT / RDX

Facing 3 - mild steel

The detonators 4 are made of carbon dioxide

Layers 5 made of RDX

The conductor layer 6 is made of ammonite

Elements 1-6 in their entirety form the RED CHARGE. To initiate it, the KRASNOV-CHARGE is placed KRASNOV-ZAPAL 7 (3) and the electric detonator 8.

The device "Extended cumulative charge (KRASNOV-CHARGE)" works as follows. As a result of the initiation of the electric detonator 8 in KRASNOV-ZAPAL 7, a plane detonation wave is formed, which passes into the conductor layer 6 simultaneously along the entire length of the KRASNOV-CHARGE. In the conductor layer 6, the detonation wave is split in two, and two detonation waves simultaneously pass from it into layers 5 of a high-speed explosive. Subsequently, the detonation wave propagates along layer 5 in the direction from the back of the charge to its frontal part. At the same time, it excites a detonation wave in the intermediate detonator 4. From the detonator 4, the wave passes to BB 1, then falls on the surface of the cumulative recess 2 and accelerates the dispersed particles of its lining 3 to speeds of the order of one or two kilometers per second. Particles on one side of the surface of the recess 2 collide with the same on the other side of the surface, and as a result a flat cumulative jet “knife” is formed. The speed of the particles that make up the “knife” is already estimated at about ten kilometers per second, and thanks to this speed, the barrier is destroyed.

Since in the detonator 4 the velocity of detonation propagation is significantly lower than in layer 5, there is a change in the general case of both the direction of propagation of the detonation wave front and the curvature of the surface of the wave front. In this case, the direction of propagation of the detonation wave front, as well as the curvature of the front surface, can be changed over a very wide range. These changes are achieved by choosing the cross-sectional shapes of the detonators 4 and BB 1, as well as by choosing the ratio of the detonation speeds of the detonator 4 and layer 5 by selecting the appropriate explosives for their manufacture. Thus, when designing the KRASNOV-CHARGE, it is possible to achieve in the concrete design the most favorable angle of incidence of the detonation wave on the surface of the notch and to obtain the highest speed and the best focusing quality of the flat cumulative “knife” jet.

An increase in the speed of the cladding particles in a flat cumulative jet, as well as the quality of its focusing, leads to an increase in the breakdown effect of the charge and, consequently, to an increase in its efficiency.

Information sources

1. RF patent No. 1792519, publ. 01/30/1993.

2. RF patent №2107885, publ. 03/27/1998 (prototype).

3. Application for the grant of a patent of the Russian Federation for the invention No. 2011153491/11 (080441), decision on the grant of a patent dated 11.29.2012.

Claims (1)

An elongated cumulative explosive charge with a longitudinal recess lined with metal, characterized in that it is equipped with two intermediate detonators located symmetrically with respect to the axial plane of the recess and made so that their thickness decreases in the direction from the back of the charge to the front, as well as two layers of explosive substances with a high detonation velocity located on the outer lateral surfaces of the charge, with each intermediate detonator located between the containing recess explosive and a layer of explosive with a high detonation velocity, and the specified layer in the back of the charge is connected to the same layer on the other side with a conductor layer of a detonation wave of explosive.