Initiation device

FIELD: demolition works.

SUBSTANCE: initiation device contains a metal housing with two coaxial blind channels divided by indestructible barrier. In one channel the pyrotechnical high-calorific preheating charge, and in another one - a pyrotechnical priming charge is located. The preheating and primer charges are made from pyrotechnical compositions forming solid slags after burning.

EFFECT: improvement of device reliability at inertial actions.

3 cl, 1 dwg

 

The invention relates to the field of pyrotechnics and can be used in the construction of the igniter device for initiating combustion of various substances in the sealed volume, in particular due to inertia effects in the process of operation of the device.

The known device for initiating combustion in a sealed volume, based on the introduction in pressurized closed volume of inputs of the bridge filament (Auxiliary systems of rocket and space technology. - M.: Mir, 1970, p. 100-102) for sealing the volume after initiation due to melting of the wall of the firing channel (U.S. Patent No. 3713392, CL F42B 3/10, 1973), on the crumpling of the insert overlapping the through holes (U.S. Patent No. 3789764, CL F42B 3/10, 1974), on the transmission of the initiating impulse of the shock wave through a sealing wall (French Patent No. 2569265, CL F42B 3/10, 1986; FRG Patent No. 3629371, CL F42C 9/10, 1987; RF Patent №2210722, CL F42B 3/10, publ. 20.08.2003).

The introduction of the inputs of the bridge filament in a closed volume is technologically complicated construction. The lack of overlap of the through holes is the low reliability seal after activation. The disadvantages of the transmission of the initiating impulse of the shock wave generated in the sealing barrier of the charge BB, include the use of explosives, which increases �claim to safety in the manufacture and operation of the igniters.

The closest technical solution is a device for iniciirovanie (Patent RF №2408834, CL F42B 3/10, publ. 10.01.2009). In this arrangement, two coaxial channel separated by a barrier. In one channel is warming the battery and the other of the igniter charge. The igniter charge is divided into two elements, which is set between the transmitting charge from malahitovaja pyrotechnic composition that forms during combustion of the solid products of combustion. This device has small dimensions and mass characteristics and the time of transmission of the initiating impulse of less than 100 MS, provides a reliable seal after activation of the device and secure in the manufacture and operate.

A disadvantage of the known device is complicated, the manufacturing technology of the device, when the equipment is used in different pyrotechnic compositions for warming, the igniter and the transfer charge. In addition, the use of three different compositions in the device reduces the reliability of his work.

The problem solved by the present invention is to improve the reliability of the device, especially when inertial effects and simplify the technology of manufacturing the device.

When using the invention achieves the following technical result:

- improving the reliability of the mouth�STS, including inertial effects;

- simplify the technology of manufacturing the device;

- maintaining seal after actuation of the device.

For solving the mentioned problem and achieve the technical result is proposed a device consisting of a arranged in the housing two coaxial channels separated by a barrier, one of which is a warming charge, and the other of the igniter charge, which according to the invention a warming and igniting the charges made of pyrotechnic composition that forms during combustion of solid waste products.

Warming and igniter charges can be made of a pyrotechnic composition or pyrotechnic compositions.

The inventive device is intended for initiating a pyrotechnic charge, the combustion of which can form liquid high-temperature combustion products. When exposed to an obstacle, especially when the inertial loads of the liquid products of combustion are subjected to additional heat, which reduces the strength characteristics of the obstacles and can lead to depressurization of the device. The use of the igniter charge of pyrotechnic composition that forms during combustion of solid combustion products, allows you to block access to indestructible preg�Ada liquid high temperature combustion products to ignite the charge and eliminate thermal shock, leading to the formation in the indestructible barrier of microcracks. This saves the efficiency of the device due to inertia effects. The use of warming up charge of pyrotechnic composition that forms during combustion of the solid products of combustion, increases the reliability of the proposed device due to the contact of the solid products of combustion with an obstacle due to inertia effects. The use of two pyrotechnic compositions, of which warm-up and igniter charges (withdrawal from the transmitting charge), increases the reliability of the claimed device, simplifies the technology of manufacturing and testing. In the case of performing warm-up and igniter charges from one pyrotechnic composition even more increases the reliability of the device and reduce the cost of its manufacture.

Diagram of the device for initiating shown in Fig.1.

In the housing 1 (Fig.1) arranged in series on the same axis channel 2 under warming charge 3, which forms during combustion of the solid products of combustion, an indestructible barrier 4 and channel 5 under the igniter charge 6, also forming during combustion of solid products of combustion. Thus indestructible barrier 4 may be of any shape (cylindrical, truncated-conical and hemispherical). Solid Pro�UKTI combustion formed during the combustion of the igniter charge 6, provide inertial impact protection barriers 4 against the penetration of liquid products of combustion generated in the combustion ignites this unit charges.

The device operates as follows. When applying an initiating pulse to warming charge 3 he is burned and the combustion products due to the contact with the barrier 4 is heated it to the temperature of ignition of the igniter charge 6, causing it to combust, thus ensuring the transmission of the firing pulse through an indestructible barrier 4. During the combustion of the igniter charge 6 are formed of solid combustion products that protect an indestructible barrier inertial effects of the liquid products of combustion generated in the combustion ignites this unit charges.

An example of a specific implementation may be the device in which the channel 2 under warming charge 3 curb warming pyrotechnic composition based on KClO4, Mo and B with a density of 4.4 g/cm3height of 4 mm. Deaf cylindrical channel 5 under the igniter charge 6 curb the same pyrotechnic composition based on KClO4, Mo and B with a density of 5.8 g/cm3, height of 10 mm (the density of the igniter charge was increased to reduce temperature e�on ignition). The thickness of indestructible steel barrier 4 is 1.5 mm.

In the second example of embodiment of the device in the channel 2 under warming charge 3 was also curb warming pyrotechnic composition based on KClO4, Mo and B with a density of 4.4 g/cm3height of 4 mm. Into the hollow cylindrical channel 5 under the igniter charge 6 was equipped with a pyrotechnic composition based on KClO4, Mo and MoS2with a density of 6.5 g/cm3, height of 10 mm. Thickness indestructible steel barrier 4 was also 1.5 mm.

In both examples, used pyrotechnic compositions to form solid products of combustion.

The tests were conducted under the influence of inertial overloads. The igniter charge 6 is ignited pyrotechnic composition based on CuO and Al, having liquid products of combustion to visually check the effectiveness of the protection obstacles combustion products vosplamenenie charge 6.

The efficiency of this device two specific accomplishments inertial effects (over 10 g) in the direction away from the igniter charge 6 to the barrier 4 is confirmed experimentally. In experiments it was found that in the channel 5 of the igniter charge 6 there is no combustion of the pyrotechnic composition based on CuO and Al. It is possible to avoid thermal shock on the indestructible barrier with 4 sides� channel 5, leading to the formation of microcracks in the barrier 4 and its overheating, which significantly reduces the strength characteristics of the device and may cause depressurization.

The use of the proposed device provides for the initiation compared with the known devices the following advantages:

- improving the reliability of the device when the inertial effects;

- simplify the technology of manufacturing the device;

- maintaining seal after actuation of the device.

1. The device for initiating, comprising a metal housing with two coaxial blind channels separated by an indestructible barrier in one channel is a pyrotechnic high-calorie warming charge, and the other pyrotechnic igniter charge, characterized in that warming and igniting the charges made of pyrotechnic compositions that form during combustion of solid waste products.

2. The device according to claim 1, characterized in that warming and igniting the charges is made of a pyrotechnic composition.

3. The device according to claim 1, characterized in that warming and igniting the charges made of different pyrotechnic compositions.



 

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