EP2133653B1 - Smoke-producing projectile - Google Patents

Description

The present invention relates to a smoke throwing body according to the preamble of claim 1.

Such smoke projectiles are intended to form a fog curtain to protect vehicles or troops against detection, detection and target tracking. Usually, smoke projectiles are carried on an armored vehicle in a plurality of ejector tubes and, if necessary, ejected by igniting a propellant charge in a trajectory defined by the angular setting of the ejector tube. Somewhat time-delayed, the result is then a burning of the smoke material and thus the generation of a fog curtain due to a pyrotechnic decomposer.

The DE 20 2006 003 023 U1 describes a generic smoke throwing body having a stack of superposed mist tablets in a can, which is arranged in the box above a sabot and the lens. To ignite the mist tablets a Anzündlitze is provided in a central longitudinal channel. After the ejection of the smoke-throwing body, the Anzündlitze provides for lighting the fog tablets and thus for the formation of a smoke screen. The problem, however, is that if the setting angle is too great, ie if the ejector tube is too steep, the formation of the smoke screen will be too high, so that the vehicle will remain visible longer from a shallower viewing angle and thus remain unprotected.

From the WO 03/106913 A1 For example, a smoke throwing device is known which comprises a plurality of layers of mistletoe tablets which are burnt off via a pyrotechnic active charge on the underside. This leads to the fact that due to the stacking individually, one after the other, burn individual, inflamed mists of pollen one after the other along the ballistic trajectory of the smoke throwing body. However, the problem here is that caused due to the burning of the individual fog tablets due successively only small nets. In addition, there is the problem that the fog wall formed thereby has a comparatively low mist density.

The US 4,791,870 A1 describes another smoke throwing body according to the preamble of claim 1. This smoke throwing body is the starting point for the present invention.

The present invention has for its object to provide a novel smoke throwing available that ensures an effective smoke screen with high fog density in no time. The present object is achieved in the generic smoke throwing body in that a plurality of separate pyrotechnic Zerlegerladungen are provided which cause fog generation and effective distribution of the fog generated at different, successive times. Due to the separate pyrotechnic decomposer charges, which cooperate with associated modules of mist material, the novel smoke-impact body makes it possible to directly, d. H. in a very short time after ejection, a first fog wall having a high fog density, which is formed by the first pyrotechnic disintegrating charge, is formed and then, with a time delay, the second fog wall is formed. As a result, a nebulization with high fog density is ensured in a very short time, which is effective even from different viewing angles.

Constructively, this can be achieved in a simple manner that at least a first and second chamber are provided, each chamber contains smoke and each chamber is assigned its own pyrotechnic bursting charge.

Characterized in that the chambers and Zerlegerladungen along the longitudinal axis of the smoke thrown body, a corresponding sandwich-like structure to ensure the time-delayed effectiveness can be realized in a simple manner.

If the respective bursting charge is accommodated in an associated longitudinal channel, located preferably in the region of the longitudinal axis, of the smoke throwing body, the bursting charge is circumferentially in contact with the smoke substance over its entire length, thereby enabling extremely rapid combustion and thus fog formation.

Conveniently, there is a partition between the two chambers, which still supports the time delay during the burning of the two chambers.

According to the invention, one of the two burster charges is provided with means for a time-delayed activation of the burster charge. As a result, a common electric ignition device can be used for both Zerlegerladungen and a simple structure can be realized. Nevertheless, the two Zerlegerladungen be effective with a time delay. The present invention is characterized in that as a means for a time-delayed effect of the Zerlegerladung an envelope, such as confinement, is provided which completely or partially surrounds the Zerlegerladung. It ensures that the already ignited material of the burster charge can not spread immediately and act on the fog material.

Preferably, the means for a time-delayed effect of the Zerlegerladung are selected so that they burn residue. There is thus no danger to troops through metal parts.

For example, this can be provided as a wrapping an organic, substantially residue-free burning material, such as cardboard, plastic or the like.

If the enclosure also has a plurality of chambers, this results in an additional time delay effect.

The invention makes it possible to use as a disintegrating charge as well as loose, poured pyrotechnic charges.

An expedient embodiment of the present invention will be explained in more detail with reference to drawing figures.

Show it:

Fig. 1

a schematic representation of the essential components of an embodiment of the inventive smoke projectile and

Fig. 2

an illustration of the smoke screen generated by the inventive smoke throwing body.

Reference numeral 1 denotes the smoke throwing body in its entirety. It comprises a housing 22. In the housing 22, a first chamber 3 and second chamber 4, which are separated from each other by a common partition wall 13, are provided.

The first chamber 3 as well as the second chamber 4 each contain so-called mists, for example in the form of a plurality of fog tablets arranged in the first chamber 3 and the second chamber 4. The fog tablets can, for example, in the way they are in the WO 03/106913 A1 are described, be formed.

Along the longitudinal axis X of the smoke throwing body is in each case a channel 11, 12 is provided which serves to receive a pyrotechnic first Zerlegerladung 5 and second Zerlegerladung 6, wherein one of the Zerlegerladungen time-delayed acts. This will be at the in Fig. 1 illustrated embodiment achieved in that the first Zerlegerladung is disposed in the channel 11, whereas the second Zerlegerladung 6 is within an additional enclosure 7, which may additionally preferably have individual chambers 8.

The respective burster charge 5, 6 may contain as a main component preferably loose, poured powder. The entirety of the Zerlegerladungen 5, 6 extends according to Fig. 1 over the entire height of the smoke throwing body 1.

Conveniently, the material of the envelope 7 is selected such that it burns residue-free or at least substantially residue-free.

The dash-dotted line in Fig. 1 indicates on a vehicle 16 (see. Fig. 2 ) located ejector tube 14 at. The ejector tube 14 is positioned on the vehicle 16 at a certain angle of inclination, which defines the trajectory of the smoke thrown. In the region of the ejector tube 14 is an electronic ignition element 15, with which the propellant charge 9 can be ignited if necessary. The propellant 9 serves on the one hand to cause the ejection of the smoke throwing body 1 on the other hand, the ignition of the Zerlegerladungen 5, 6.

Fig. 2 shows the smoke projectile according to the invention in use. The smoke hatch 1 is ejected from the ejector tube 14 on the vehicle 16 by igniting the propellant charge along a flight path 17. In this case, after a very short time a burning of the mist 2 of the first chamber 3, whereby a fog wall 20 is formed immediately in front of the vehicle 16.

Then burns due to the envelope 7 time delay of the mists 2 of the second chamber 4 also from and forms the in Fig. 2 marked with reference numeral 21, further smoke screen. Despite a comparatively steeply oriented positioning of the ejector tube 14 on the vehicle 16, a fog wall 20 with a very high fog density is generated immediately ahead of the vehicle and a further fog wall 21 is delayed, so that the missile from different trajectories 19 no longer has any possibility of optical locating. The forming, resulting from the partial mist walls 20, 21 resulting total mist wall is characterized on the one hand by a very rapid emergence to the other by a very high fog density. In addition, the relevant smoke projectile can be produced with very simple means. Since there are no residues or at least essentially no residues, there is no danger to ground troops.

The present invention therefore represents a very special contribution in the relevant field of technology.

LIST OF REFERENCE NUMBERS

1

A smoke

2

smoke-producing substance

3

First chamber

4

Second Chamber

5

First burster charge

6

Second burster charge

7

wrapping

8th

chamber

9

propellant

10

sabot

11

channel

12

channel

13

partition wall

14

throw-off tube

15

Electronic ignition element

16

vehicle

17

trajectory

18

missile

19

Trajectory missile

20

smokescreen

21

smokescreen

22

casing

Claims (9)

1. Smoke-producing projectile (1) with a flammable smoke-producing substance (2), which is accommodated in a chamber (3) of the smoke-producing projectile (1),
   wherein multiple pyrotechnic bursting charges (5, 6) are provided separately from one another, having the effect of producing smoke and effectively distributing the smoke produced at different successive times,
   wherein at least one first chamber (3) and one second chamber (4) are provided, each chamber (3, 4) contains smoke-producing substance (2) and each chamber (3, 4) is assigned a pyrotechnic bursting charge (5, 6) of its own,
   wherein one (6) of the two bursting charges (5, 6) is provided with a means for time-delayed activation of the bursting charge (6), characterized in that a casing (7), which completely or partially surrounds the bursting charge (6), is provided as the means for time-delayed activation of the bursting charge (6).
2. Smoke-producing projectile according to Claim 1,
   wherein the bursting charge (5) that brings about the first smoke formation is located on the side of the smoke-producing projectile (1) that is lying in the direction of flight.
3. Smoke-producing projectile according to Claim 1 or 2,
   wherein the chambers (3, 4) and the bursting charges (5, 6) are located along the longitudinal axis of the smoke-producing projectile (1).
4. Smoke-producing projectile according to Claim 3,
   wherein the respective bursting charge (5, 6) is accommodated in an associated longitudinal channel (11, 12) of the smoke-producing projectile (1), preferably located in the region of the longitudinal axis.
5. Smoke-producing projectile according to one of the preceding claims,
   wherein a separating wall (13) is provided between the two chambers (3, 4).
6. Smoke-producing projectile according to one of the preceding claims,
   wherein the bursting charges (5, 6) and the casing (7) burn substantially without any residue.
7. Smoke-producing projectile according to Claim 6,
   wherein an organic substance is provided as the casing (7).
8. Smoke-producing projectile according to one of the preceding claims,
   wherein the casing (7) has a plurality of chambers (8) .
9. Smoke-producing projectile according to one of the preceding claims,
   wherein press-moulded and/or loosely filled pyrotechnic compositions are provided as a main constituent for the bursting charge (5, 6).

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