RU2704500C1 - Contact electronic fuse to artillery ammunition - Google Patents

Abstract

FIELD: military equipment.

SUBSTANCE: invention relates to military equipment. Contact electronic fuse to artillery ammunition consists of metal housing, in upper part of which there is pyrotechnic source of electric current with electronic control system. Control circuit comprises in-series connected to the electric current source a first diode, a second diode, a resistance, an external mode switch, a delay line, an inertial contact group and an electric igniter, between which, parallel to the electric igniter, an actuating capacitor and a second capacitor are connected. In the middle part of the fuse housing there is a protection device with a mechanical inertial contact group, an electric igniter connected to an actuating capacitor, a transfer charge, moving screen located between electric igniter and transfer charge. Moving screen in initial state is fixed by pyro-support. Protection device also includes an inertia pyrotechnic cap-igniter with movable pyrotechnic element, having holes in its housing, namely, one in contact area with pyro-support and second one in upper part in contact zone with inlet hole of pyrotechnic source of electric current. In lower part of fuse there is detonator. Transfer charge is arranged above detonator. Electronic control circuit incorporates delay device with external switch. Elements of electronic control circuit are fixed with fast-hardening plastic.

EFFECT: invention can be used in development and manufacture of fuses for artillery ammunition.

1 cl, 3 dwg

Description

The invention relates to military equipment and can be used in the design and manufacture of fuses for artillery ammunition. Currently, many contact mechanical fuses have been developed and are being applied to artillery ammunition, which provides for the detonation of a projectile when it hits an obstacle. The disadvantage of these fuses is the lack of reliability and safety in case of unauthorized bumps and falls (A. Nikitin Premature operation. - Kovrov: Media-Press, 2018. - 208 p.).

Electronic, as a rule, remote and non-contact fuses, use duplicate contact action in their circuits. These fuses due to additional stages (due to electronic circuits) of protection are much safer than mechanical ones (Kuznetsov NS. Prospects for the use of remote explosive devices // Scientific and Technical Collection of the State Research Center of the Russian Federation FSUE TsNIIHM named after DI Mendeleev // Ammunition, No. 1, 2016, pp. 64-68. NS Kuznetsov ON THE QUESTION OF CREATING MODERN MULTI-FUNCTIONAL EXPLOSIVES FOR MUNITIONS OF STEM ARTILLERY AND REACTIVE SYSTEMS OF VOLUME FIRE // Scientific and Technical Collection of the Scientific Research Center for Scientific Research of the Russian Academy of Medical Sciences and Medical Sciences. // Ammunition, No. 1, 2016, p. 58-63).

The aim of the present invention is to provide a contact electronic fuse more reliable and safer than mechanical fuses.

The proposed electronic contact fuse satisfies these requirements.

The design of the proposed fuse is illustrated by the drawings shown in FIG. 1-3.

FIG. 1. Electronic contact fuse:

1 - metal case;

2 - safety detonating mechanism (PDM);

3 - pyrotechnic igniter capsule;

4 - detonator;

5 - pyrotechnic current source (V-25);

6 - hole in the igniter capsule;

7 - cavity;

8 - inlet of a pyrotechnic current source;

9 - elements of PDM;

10 - napolnik;

11 - pyrotechnic element;

12 is an electronic control circuit;

13 - quick-hardening plastic;

14 - fairing;

15 - screw.

FIG. 2. Schematic diagram of the control of the detonation of a contact electronic fuse:

B - pyrotechnic battery; D1 and D2 diodes; R is the resistance;

C1 and C2 capacitors (C1 >> C2);

P - contact switch of operating modes (with deceleration and instantly);

3 - a cell of a delay of time (time of deceleration of explosion)

K is the inertial contact group;

EV is an electric igniter.

FIG. 3. Safety detonating mechanism:

16 - case;

17 - elements of PDM;

18 - electric igniter;

19 - Executive capacitor C2;

20 - mechanical inertial contact group;

21 - transfer charge;

22 - movable screen.

Contact electronic fuse for artillery ammunition, consists of a metal casing 1 (Fig. 1), in the upper part of which there is a pyrotechnic electric current source 5 (Fig. 1) with an electronic control circuit 12 (Fig. 1). The main elements of the electronic control circuit are shown in FIG. 2. The electronic control circuit includes serially connected to an electric current source

B, the first diode D1, the second diode D2, the resistance R, the external mode switch P, the delay line 3, the inertial contact group K and the EV electric igniter, between which, in parallel to the EV electric igniter, an executive capacitor C2 and a second capacitor C1 are connected. In the middle part of the metal body of the fuse 1 (Fig. 1), a safety device 2 (Fig. 1) is installed with a mechanical inertial contact group 20 (Fig. 3), an electric igniter 18 (Fig. 3) connected to an executive capacitor C2, and a transfer charge 21 (Fig. 3), a movable screen 22 (Fig. 3), located between the electric igniter 18 and the transfer charge 21. The movable screen 22 in the initial state is fixed with a pyro-stop (not shown in the figures). An inertial pyrotechnic igniter capsule 3 (Fig. 1 and Fig. 3) with a movable pyrotechnic element 11 (Fig. 1) is also installed in the safety-detonating mechanism 2, having holes in its body, namely, one in the area of contact with the pyroscope ( not shown) and the second 6 (Fig. 1 and Fig. 3) in the upper part in the area of contact with the inlet of the pyrotechnic electric current source 5 (Fig. 1). In the lower part of the fuse is a detonator 4 (Fig. 1 and Fig. 3). Above the detonator 4 (Fig. 1) is a transfer charge 21 (Fig. 3). In the electronic control circuit 12 (Fig. 1) there is a delay device 3 (Fig. 2) with an external switch P (Fig. 2). Elements of the electronic control circuit are fixed by quick-hardening plastic 13.

Contact electronic fuse to artillery ammunition works as follows. When fired from an artillery gun under the action of inertia, the movable pyrotechnic element 11 of the igniter capsule 3 interacts with the cap 10 and ignites. The force of the flame through the hole 6 in the pyrotechnic igniter capsule 3 (Fig. 3) and the cavity in the fuse case 7 (Fig. 1) enters the inlet 8 of the pyrotechnic electric current source 5, for example, B-25 and initiates the operation of this source. The electric current from the current source 5 energizes the electronic control circuit and charges the executive capacitor C2 and capacitor C1. Capacitor C1 has a capacity many times greater than the capacity of the executive capacitor C2 and acts as a supporting current source after the end of the pyrotechnic source 5. Diodes D1 and D2 act as gates, and do not allow the capacitors to discharge.

The force of the flame from the igniter capsule 3 also falls on the pyrostopor (not shown in the figures). A combustible substance burns out in the pyrostop and the stopper does not fix the movable screen 22, which then moves under the action of the spring and opens the space between the electric igniter 18 and the transfer charge 22. At this moment, the last stage of protection is removed in the fuse.

At the moment of the projectile hitting the obstacle, the inertial contact group 20 (Fig. 3) K (Fig. 2) closes, the actuator capacitor C2 and the EV electric igniter (Fig. 2) 18 (Fig. 3) are closed. The electric igniter 18 initiates the operation of the detonator 4, which detonates the projectile.

The presence in the fuse of the delay line allows you to detonate the projectile after a certain time after impact with an obstacle. The inclusion of delay 3 is carried out before firing by mechanical switching of the fuse, namely, using switch P.

Thus, the claimed device allows to provide a high degree of protection of the fuse from external influences, making it safe to use and reliable in operation.

Claims (1)

Contact electronic fuse for artillery ammunition, consisting of a metal case, in the upper part of which there is an electric current source with an electronic control circuit including a first diode and an electric igniter connected in series with the electric current source, between which, in parallel with the electric igniter, an executive capacitor is connected, in the middle part a safety device with a mechanical inertial contact group, an electric igniter is installed, connected to the executive capacitor, the transfer charge, the movable screen located between the electric igniter and the transfer charge, the pyroscope of the movable screen, the inertial pyrotechnic capsule igniter, having in its case a hole in the zone of contact with the pyrostop, and in the lower part the detonator located under the transfer charge, characterized in that in the upper part of the pyrotechnic igniter capsule there is a second hole, pyrotechnics are used as a source of electric current In the electronic control circuit, there is a delay device with an external switch, a second diode and a second capacitor, the second diode connected to the circuit between the first diode and the executive capacitor, and the second capacitor turned on parallel to the Executive capacitor and the source of electric current through the second diode.

Images