RU111277U1 - SECURITY AND EXECUTIVE MECHANISM FOR AMMUNITION - Google Patents

Abstract

 The safety-executive mechanism for the warheads of missile ammunition having an on-board power supply containing a security system, a full-time engagement system and a combat cocking system, characterized in that the mechanism comprises a shunt of an electric detonator bridge, consisting of contacts and a conductive damper located between the cover of the safety-executive mechanism and the body of the electric detonator.

Description

The technical solution relates to military equipment and is intended for use in safety-executive mechanisms (PIM) of warheads (warheads) of missiles or shells having an onboard power supply (BIP).

Known PIM, developed according to patent US 6 142 080 from 11/07/2000, which contains a resistor, an electric capacitor, a damper and an electric detonator (ED). The electric capacitor is charged from the BIP through a centrifugal contactor, and the electric capacitor is discharged to the ED when the warhead meets the target obstacle.

Known PIM, selected as a prototype, developed according to patent RU 2 333458 from 10.11.2008, containing a sleeve that houses an electric capacitor, electric motor, shutter, pyrotechnic fuse, pyrotechnic switch, inertial contactor, electric igniter, resistors. The sleeve is housed in a housing having terminals for connecting to electrical circuits of the warhead. The case with the sleeve is closed by a metal cover, under which a plastic gasket with a central hole is installed to ensure electrical insulation. The ED bridge is bypassed by means of a changeover contact connected to the terminals of the ED.

The disadvantage of these designs is poor protection against high-voltage static electricity, the value of which, for example, in humans, can reach 25 kV. When a static voltage is applied to the cover and the PIM terminals, a potential difference arises between the ED case and its bridge, while the air gap between the cover and the damper breaks out, between the shutter and the ED case, and then the gap between the ED case and its bridge, which can cause the ED to operate in the same way as in spark electric detonators. In addition, to ensure safety in official circulation and to prevent unauthorized operation of the ED during the control of the electric circuits of the rocket, it is necessary that the gap between the bridge and the ED case be additionally shunted.

The problem solved by this technical solution is to ensure the safety of the PIM when exposed to high-voltage static electricity and during the control of the rocket's electrical circuits.

The problem is solved in that the safety-executive mechanism for the warheads of missile ammunition having an on-board power supply contains a safety system, a standard engagement system and a combat cocking system, while it contains a shunt of the electric detonator bridge, consisting of contacts and a conductive damper located between the cover -executive mechanism and electric detonator case

The proposed utility model, as well as the prototype, contains a safety system, including a shutter with a pyrotechnic fuse and an electric shunt of an electric detonator, a standard operating system, including an electric detonator, triggered by an electric capacitor and transmitting a detonation pulse to the warhead, and a combat cocking system, including an electric capacitor, an inertial contactor triggered when the ammunition is started, the electric igniter and the pyrotechnic distant cocking stop, holding throttle.

In contrast to the prototype in the proposed utility model, the filament bridge of the ED is connected through the terminals of the ED and through the hollow mounting rivets by soldering with the contacts. The latter, relying on a metal shutter, form a low-resistance electrical circuit parallel to the electric circuit of the ED and thus shunting the bridge of the ED. At the same time, in the proposed utility model, the gap between the bridge and the ED housing is also shunted, while the shunt is carried out from the ED bridge through its conclusions, elastic contacts resting on the shutter, which is located between the metal cover and the ED. The design, material and coating of the contacts ensure their reliable contact with the flap (the contact of the contacts on the flap is carried out with force, for which the latter are made of special elastic material, for example, Kamelon type alloy and others).

Figure 1 shows a schematic electrokinematic diagram explaining the operation of PIM. Figure 2 shows the design of the PIM in axial section, figure 3 is a section through an electric igniter, pyrotechnic fuse, inertial closure and resistor.

PIM contains a sleeve 1 (Fig. 2), in which there are ED 2 (Figs. 1 and 2), including a metal casing 3 (Fig. 1), a glow bridge 4 and conclusions 5; ED shunt, consisting of a shutter 6 (FIGS. 1 and 2), contacts 7, hollow rivets 8 (FIG. 2), through the openings of which the leads 5 of the ED are passed; resistors 9 and 10 (FIG. 1), inertial contactor 11 (FIGS. 1 and 3), an electric igniter 12, a pyrotechnic fuse 13 (FIG. 3), an electric capacitor 14 (FIG. 1), mounting wires and an electrical insulating case 15 (FIG. 2) with external terminals 16 ("A", "B", "C" and "G"). The sleeve 1 and the terminals 16 are placed in the housing 15, covered with a plastic gasket 17 (figures 1 and 2), a foil gasket 18 and a metal cover 19.

To ensure safety in service circulation, the ED 2 (Fig. 2) and its glow bridge 4 (Fig. 1) are shunted by contacts 7 and the shutter 6, which ensures that the ED does not work under the influence of static electricity, as well as with an accidental supply of voltage to the external terminals 16.

When there is a static electric charge on the outer terminals 16 and the metal cover 19 of the PIM, the air gap 20 (Fig. 1) breaks down between the cover 19 and the shutter 6 through the central hole in the plastic gasket 17. Next, the charge from the shutter 6 goes to the elastic contacts 7 and then - to the external terminals 16 of the PIM, bypassing the glow bridge 4 ED, while the gaps 21 and 22 do not break through and the potential difference in the gap 22 between the housing 3 of the ED and its bridge 4 is absent. The electric circuit ED 2 (glow bridge) connected in parallel to the shunting electric circuit, the shutter 6 - contacts 7, remains intact, the ED does not operate. To ensure reliable ED bypass, the elastic contacts 7 and the shutter 6 are coated with a low electrical resistivity.

The PIM works as follows: when fired, the contacts of the inertial contactor 11 (Figs. 1 and 3) are closed and the voltage from the BIP 23 is supplied through the terminals "B" and "C" to the resistor 9 (Figs. 1 and 3) and to the electric igniter 12, when the actuation of which occurs ignition of the composition in the pyrotechnic fuse 13 (figure 3). Simultaneously, through the terminals "A", "B" and the resistor 10 (Fig. 1), the electric capacitor 14 is charged. After burning the composition in the pyrotechnic fuse 13, its stopper releases the shutter 6 (Figs. 1 and 2), which moves to the combat position, the electric circuit between contacts 7 is opened, thereby removing the bypass of the ED 2. When the warhead meets the target obstacle, the terminals “B” and “G” are closed and the capacitor 14 (Fig. 1) is discharged to the ED, causing it to fire and the warhead to operate .

The proposed design of PIM will allow without complication in relatively small dimensions to increase the safety of ammunition when exposed to static electricity, as well as when monitoring electrical circuits in arsenals and in the troops.

Claims (1)

The safety-executive mechanism for the warheads of missile ammunition having an on-board power supply containing a security system, a full-time engagement system and a combat cocking system, characterized in that the mechanism comprises a shunt of an electric detonator bridge, consisting of contacts and a conductive damper located between the cover of the safety-executive mechanism and the body of the electric detonator.