Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
  • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
  • F42C9/10—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by combustion
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
  • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
  • F42C9/10—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by combustion
  • F42C9/12—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by combustion with ring combustion elements

Definitions

• the invention relates to a pyrotechnic delay device for an ammunition fuse with a pyrotechnic delay element which is ignited when firing the ammunition and after a predetermined delay time a main charge, a Austreibladung o.
• the invention relates to a (multi-) adjustable, launch-initiated pyrotechnic delay unit for initiation and expulsion of, for example, red phosphorus (RF) as fogging compound into or out of a particular (fly-k) mortar projectile.
• RF red phosphorus
• the invention further relates to a mortar shell with such a delay device.
• Pyrotechnic deceleration devices for ammunition fuzes have long been known. They are used, for example, to detonate explosive charges of ammunition after a precisely predetermined delay time, for example above a target area. However, mist or light-generating materials can also be ejected from corresponding missiles after the delay time has elapsed. Finally, the known pyrotechnic deceleration devices may be safety devices that directly destroy or crash the corresponding projectile after a predetermined delay has elapsed.
• DE 1 1 14 125 B describes a triggerable by means of electricity pyrotechnic igniter, which is connected only when shooting with the power source.
• a self-destructive device for an ammunition in DE 1 1 2005 001 081 B4 is disclosed. This self-destructive device is formed by an electro-pyrotechnic device, which in turn is time-delayed connected to an energy reserve after a predetermined delay.
• DE 60 2004 003 544 T2 a further electronic delay is likewise published for the ignition of a pyrotechnic component.
• DE 28 38 055 C With an electric detonator with an electronic impact delay, DE 28 38 055 C.
• a mechanically adjustable delay element can be removed from DE 10 2012 014 149 B3.
• the mechanical adjustment consists at least of a tube, a sleeve and a chemical set as a delay set, which is located in the pipe.
• a displacement of the sleeve on the tube in the axial direction causes a release of the delay set to the ignition charge and thus an adjustment of the delay time.
• the non-prepublished DE 10 2012 014 150.5 includes a pressure-controlled delay element for an ammunition and the like with an ignition charge.
• the delay element described therein comprises a tube, a sleeve, a bias, and a chemical delay set introduced into the tube.
• the tube has an axial slot over part of its length and is axially slidably mounted in the sleeve and biased by the bias.
• a narrow annular surface of the sleeve covers the end of the slot on the firing side.
• This pressure is the control variable for the pressure-controlled delay element.
• the gas pressure acts on the face of the tube and pushes it until the equilibrium of forces against the bias voltage is adjusted.
• the tube is displaced against the preload.
• the slot in the tube and the annular surface of the sleeve are moved against each other. A part of the covered slot becomes free and the delay set comes into contact with the ignition charge in this area - the delay time is shortened.
• the delay time is usually not adjustable in pyrotechnic delay devices. Rather, to change the delay time, the respective delay element must be replaced by another delay element.
• the invention has for its object to provide a pyrotechnic delay device with adjustable delay or delay time, without requiring an exchange of the delay element is required. Furthermore, a mortar shell with a, such a delay device having ammunition fuze to be disclosed.
• the invention is based essentially on the idea that the initiation of the reactive-acting bullet payloads is brought about via a bullet-side, in particular prior to launch by the shooter also stepwise adjustable, pyrotechnic acting delay unit.
• a functional claim is often found in light mortar cargo ammunition in which, in contrast to conventional mortar shells, the primary effect in the target is not caused by the projectile itself, but by their close to the target ejected, autonomously acting payload.
• the inventive delay device comprises, in addition to the pyrotechnic delay element with a fixed delay time (maximum delay time), a bypass element with a pyrotechnic transfer charge which has a significantly higher burnup rate than the material of the pyrotechnic delay element.
• the pyrotechnic retardation element is arranged in a hollow cylindrical first housing, which is enclosed by a hollow cylindrical second housing at least in a partial area, wherein the first and the second housing for adjusting the delay time are arranged rotatable relative to each other about a common longitudinal axis.
• At least one bypass bore extends parallel to the first housing and is connected to at least two radial bores which are axially spaced apart from one another and are directed to the first housing. at the first hole on the main or Austreibungsladung or the like. facing side of the bypass hole is arranged.
• the side wall of the first housing further comprises at least a third and a fourth radial bore, which are arranged such that they are aligned at a predeterminable angle of rotation with respect to the second housing with the first and second radial bores arranged in this housing.
• the bypass bore and the radial bores of the first and second housing are filled with the pyrotechnic transfer charge, so that when an alignment of the radial bores of the first and second housing, the delay time between the ignition of the delay element and the lighting of the main or Austreibladung o.dgl. is shortened by a predetermined by the axial position of the fourth (and thus also the second) radial bore period.
• a maximum delay time is set. If now a delay time is set with the delay device, which is less than the maximum delay time, the bypass element is activated after the burning of a predetermined first portion of the delay element, so that the remaining second portion of the delay element is bridged by the bypass element and the corresponding main or Austreibladung or the like. is ignited immediately after the burning of the first section.
• the two housings are rotated relative to each other about the longitudinal axis, that the radial holes are not aligned, so that the bypass is deactivated and it through this no longer comes to a premature ignition of the pyrotechnic delay line.
• the number of radial bores in the first and second housings must be correspondingly increased in the axial direction and arranged to be displaced relative to one another on the circumferential side.
• the associated radial bores in the two housings are again arranged in alignment.
• the rotational angles at which the radial bores are aligned and therefore defined shortened delay times, each fixed via a releasable locking connection, wherein a latching element arranged in the side wall of the second housing spring-loaded ball can be provided radially into a blind hole Outer wall of the first housing is hineindrückbar.
• FIG. 1 shows a longitudinal section through a schematically illustrated ammunition lighter with pyrotechnic delay device according to the invention, wherein the delay device is set such that it requires its maximum delay time in order to activate a main charge after its ignition,
• FIG. 2 shows the ammunition lighter illustrated in FIG. 1, wherein the delay device is set such that the delay time is approximately 50% of the maximum delay time in order to activate the main charge, and
• FIG. 3 shows the schematic representation of a mortar shell with an ammunition fuse with inventive delay device.
• an ammunition fuze which consists of an ignition element 2 of a pyrotechnic delay device 3 and a main charge 4, for example, for igniting an explosive charge (not shown).
• the ignition element 2 it may, for example, a Zündplättchen which is ignited by means of a hammer, but also act as an electrically ignitable element.
• the pyrotechnic delay device 3 comprises a pyrotechnic retardation element 5, which is arranged in a hollow-cylindrical or tubular first housing 6.
• This first housing 6 is partially enclosed by a hollow cylindrical or rohrformigen second housing 7.
• the first and the second housing 6 and 7 are arranged rotatable relative to each other about a common longitudinal axis 100.
• bypass hole 9 In the side wall 8 of the second housing 7 extends parallel to the longitudinal axis 100, a bypass hole 9.
• This bypass hole 9 is connected to two axially spaced, directed to the first housing 6 radial bores 10, 1 1, wherein the first bore 10 on the main charge 4 facing side of the bypass hole 9 and the second hole 1 1 are arranged approximately in the middle between the ignition element 2 and the main charge 4.
• the side wall 12 of the first housing 6 has a third and a fourth radial bore 13, 14, which are located in Fig.1 on the side facing away from the viewer side of the first housing 6. These bores 13 and 14 are arranged such that they are aligned on rotation of the first housing by 45 ° relative to the second housing 7 with the arranged in this housing 7 first and second radial bores 10, 1 1 ( Figure 2).
• Both the bypass bore 9 and the radial bores 13, 14 of the first housing 6 and the radial bores 10, 1 1 of the second housing 7 are filled with a pyrotechnic transfer charge 15, whose burning rate is substantially higher than that of the pyrotechnic retarding element. 5
• the two housings 6 and 7 are rotated relative to each other about the longitudinal axis 100 that the radial bores 10 and 13 and 1 1 and 14 are not aligned with each other and, for example, an arrangement results, as shown in Fig.1. If, on the other hand, an ignition of the main charge 4 takes place approximately halfway through the maximum adjustable delay time, the two housings 6 and 7 are rotated relative to one another about the longitudinal axis 100 in such a way that the arrangement shown in FIG.
• FIG. 3 schematically shows a mortar shell 16, which is, for example, a mortar shell which can be fired from a mortise mortar.
• the mortar shell 16 comprises an active charge 18 (eg from a mist-producing material) receiving front projectile portion 17 and a tail adjoining tail unit 19.
• the active charge activating ammunition 1 detonator 1 corresponds to the above, with the aid of Figures 1 and 2, described ammunition 1, wherein the ignition element 2 can be activated by an impact element 20.
• the front projectile part 17 is arranged rotatable relative to the adjoining tail part 19 about the longitudinal axis 100 of the mortar shell 16.
• the first housing 6 of the pyrotechnic delay device 3 with the ignition element 2 and the subsequent main charge 4 are therefore non-positively and / or positively connected to the tail part 19.
• the second housing 7 of the deceleration device 3 is non-positively and / or positively connected to the front shell part 17 of the mortar shell 16 containing the active charge 18.
• the rotational angles at which the radial bores 10 and 13 and 1 and 1 are aligned with each other are each fixed by releasable latching connections.
• the number of radial bores in the first and second housing in the axial direction must be increased accordingly and circumferentially arranged such that the input side (ie in the weft direction back) and the output side (ie in the weft direction forward) respectively only one, the respective delay time corresponding aligned arrangement of radial bores in the first and second housing are connected in alignment with each other.

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Citations (4)

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• 2013
  • 2013-08-20 DE DE201310013705 patent/DE102013013705A1/de not_active Withdrawn
• 2014
  • 2014-07-24 DK DK14744313.9T patent/DK3036501T3/en active
  • 2014-07-24 ES ES14744313.9T patent/ES2672309T3/es active Active
  • 2014-07-24 PL PL14744313T patent/PL3036501T3/pl unknown
  • 2014-07-24 WO PCT/EP2014/065959 patent/WO2015024730A1/de active Application Filing
  • 2014-07-24 EP EP14744313.9A patent/EP3036501B1/de active Active
• 2015
  • 2015-11-25 NO NO15003372A patent/NO3032209T3/no unknown

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