RU2462680C2 - Anti grenade launcher safety device - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: safety device has mesh deflecting elements, mounted in front of the protected object. On the outer side an additional mesh screen is made at a distance of not less than one and no more than five lengths of grenades, with the size of the cell of not less than the caliber of grenades, and no more than the amplitude of the stabiliser fins of hollow charge grenade.

EFFECT: deviation of the grenade from initial flight trajectory.

Description

The invention relates to the field of armaments and military equipment and is intended to protect checkpoints of stationary and mobile deployment, places of concentration of military equipment, poorly protected environmentally hazardous and explosive objects, etc. from the effects of anti-tank grenades of the PG-7 type, rocket-propelled anti-tank grenades RPG-18, RPG-22, RPG-26, RPG-27 and other similar types of weapons.

The search for analogues of technical solutions was carried out according to the sources of patent and scientific and technical information of Russia (USSR), the USA, Germany, France, Great Britain, Japan, and the European Patent Office for the period from 1975 to 2000. In the search for analogues, promising directions and new principles for creating effective means of protection against the effects of small arms and grenade launcher bullets were identified. The most promising should include funds using ceramic materials, protective materials based on fabrics from high-modulus aramid fibers, means using deflecting elements.

As deflecting elements, various devices can be used in the form of a combination of plates located at different angles to each other, corrugations, thin-walled gratings, etc. The most effective means are metal grids, which at a certain location provide deflection of bullets.

An analogue of the claimed invention is the "anti-grenade and bulletproof protective device" according to the patent of Russia №2122702, publ. 11/27/1998.

The device is placed in front of the protected object and consists of metal shock-absorbing nets, for example, shell-shaped or netting, installed at an angle to each other at a distance between them more than the length of the grenade, and their removal from the object’s wall is 1-15 grenade lengths. Metal mesh curtains have different cell sizes and are in a loose loose state. The curtain closest to the object has a cell size of at least half and no more than one caliber of a bullet, and more distant curtains - at least half and no more than one caliber of a grenade.

The disadvantage of this device is the irregularity of the size of the cells and the insufficiently high probability of deviation of the grenade from the original flight path and, as a result, the rather low survivability of each grid.

The closest analogue of the claimed technical solution is the "System of engineering protection and the initiation of the operation of fuses of reactive cumulative grenades" according to the patent of Russia No. 2199711, publ. 02/12/2001.

The system includes protective elements in the form of screens made of metal grids with a cell size of half to one grenade caliber. The screen farthest from the protected object is made of a grid with a cell size in the light of not more than the diameter of the head of a grenade fuse.

The prototype provides a high probability of firing a cumulative grenade fuse, but does not provide the deviation of the grenade from the original flight path. In the case of a grenade deflection, interaction with the main mesh screen can be completely avoided, or the collision will occur with a deviation from the original trajectory, and consequently, grenade residues, such as fragments, a cumulative stream (if the grenade is cumulative) and the remnants of the grenade’s main engine will fly after a deflected explosion from the initial trajectory, and therefore, the probability of damage to the protected object will be reduced.

The aim of the invention is to neutralize the action of the grenade on the protected object by increasing the likelihood of deviation of the grenade from the original flight path.

The specified technical result is achieved by the fact that on the outside there is an additional mesh screen at a distance of not less than 1 and not more than 5 lengths of a grenade, with a cell size of not less than a caliber and not more than the span of the feathers of the cumulative grenade stabilizer. The grid on the screen is in an loose state, which increases the chance of the grenade deflecting.

If the screen is installed at a distance of less than 1 grenade length, the stabilizer will catch on the screen grid after interacting with the next screen, which may not allow the grenade to deviate. If the screen is installed at a distance of more than 5 grenade lengths, the deviated grenade along the hinged path can fly over the protective structure and fall into the protected object.

The mesh cell size of the additional mesh screen is determined based on the following considerations: when the mesh size is more than the stabilizer feathers span, the likelihood that the stabilizer feathers catch on the screen mesh is insufficient, when the mesh size is less than the size of the grenade’s caliber, the mesh in the interaction area can trigger the grenade.

The device operates as follows. Cumulative grenade, overcoming an additional mesh screen, clings with the feathers of the stabilizer to the grid, as a result of which the grenade is removed from the original flight path.

The authors conducted experimental firing of anti-tank grenades with the aim of testing the specified engineering protection system using an additional mesh screen installed at a distance of at least 1 and no more than 5 grenade lengths and with a cell size of at least caliber grenades and no more than the magnitude of the feathers of the cumulative grenade stabilizer showed it effectiveness and deflection of cumulative grenades in 3 out of 5 cases.

Thus, the present invention in comparison with the closest analogue provides an increased likelihood of deflection of cumulative grenades on an additional mesh screen.

Claims (1)

Anti-grenade safety device, including mesh deflecting elements installed in front of the protected object, characterized in that on the outside there is an additional mesh screen at a distance of at least 1 and no more than 5 lengths of a grenade, with a cell size of at least caliber grenades and no more than the width of the feathers of the stabilizer cumulative grenade.