RU109135U1 - STARTING-UP PULSE TRANSMISSION DEVICE - Google Patents

Abstract

 An initiating pulse transmission device, including an igniter, activated from the initial impulse, initiating a charge of a pyrotechnic composition, made in the form of a cylinder, which is placed in a perforated tube, at each of the ends of which a firing pulse transmitting and receiving unit is installed, characterized in that the initiating charge is made with a central axial channel in which the fire tube is installed, and the fire pulse receiving and transmitting units are made in the form of pyrotechnic check valves Wii.

Description

The utility model relates to the field of pyrotechnics and can be used as a means of initiation, namely, a means of igniting pyrotechnic compositions and powders in pyrotechnic or powder sources of pressure, gas generators used in industry.

The problem solved by the claimed utility model is to create a device for transmitting an initiating pulse, which stably and reliably ignites the initiated charge.

A device is known for transmitting an initiating pulse to a gas-generating charge (description of patent RU 2211064, published August 27, 2003), including a sequentially igniter operating from the initial impulse and an initiating charge made of a pyrotechnic composition in the form of a pressed cylinder with a solid or with an axial hole . An electric igniter is used as the igniter and the current pulse serves as the initial pulse. The igniter is hermetically placed in the cover from the end of the cylinder, which, in turn, hermetically closes the open end of the power housing with the sealing ring, in which the initiated gas-generating charge is placed.

The disadvantage of this design is that when exposed to mechanical loads (transportation, drop. Shock, various kinds of overload), the initiating charge due to the lack of booking through the internal channel is prone to partial destruction.

There is another device for transmitting an initiating pulse to a gas-generating charge (description to patent RU 2404847, publ. 11/27/2010), partially eliminating the disadvantages of the above and selected as a prototype. The device includes an igniter, activated from the initial impulse, initiating a charge from the pyrotechnic composition, made in the form of a cylinder placed in a perforated tube, at each end of which a firing pulse transmitting and receiving unit is installed, which is a sleeve in which a hinge of quick-burning pyrotechnic composition is placed and a sample of burning pyrotechnic composition.

A disadvantage of the known device is that the transmission of the ignition pulse to the receiving and transmitting unit located at the output of the initiating charge occurs during the formation of the combustion front throughout the initiating charge, which reduces the speed of propagation of the flame force to this node and reduces the efficiency of the device. In addition, during the combustion of the mountings of the transmission receiving unit, the combustion products adversely affect the formation of the combustion front, which reduces the stability of the combustion conditions.

The technical result that is achieved by using the claimed utility model is to ensure the stability of the device and increase its efficiency.

The specified technical result is achieved due to the fact that in the transmission device of the initiating pulse, including the igniter, activated from the initial pulse, initiating a charge of the pyrotechnic composition, made in the form of a cylinder, which is placed in a perforated tube and from each of the ends of which there is a receiving-transmitting unit the fire pulse, the initiating charge is made with a central axial channel in which the fire tube is installed, and the fire pulse reception and transmission unit is made in the form pyrotechnic valve reverse action.

The implementation of the initiating charge with a central axial channel in which the flame tube is installed allows eliminating the effect on the burning speed in the axial direction of the different density of the composition of the initiating charge (when it is solid) and, thereby, ensures a stable and higher speed of propagation of the flame force along the axial the fire tube to the receiving-transmitting unit located at the output of the initiating charge, leading to an increase in the efficiency of the device.

The implementation of the node of the reception and transmission of the fire pulse in the form of a pyrotechnic valve with a reverse action allows the fire line to be blocked and the combustion products are eliminated in the opposite direction, thereby ensuring stable combustion conditions for the initiating and working charges at high pressure inside the combustion volume and increasing the efficiency of the device.

Figure 1 shows a structural diagram of a gas generator in which the inventive device is used, where:

1 - igniter;

2 - input node transmit-receive;

3 - initiating charge;

4 - perforated tube;

5 - fire tube;

6 - output node transmit-receive;

7 - working charge;

8 - case;

9 - a cover;

10 - shirt.

An example of a specific implementation of the claimed device is a device for transmitting an initiating pulse to a working charge of a gas generator. The device includes a sequentially located igniter - a powder charge, an input receiving-transmitting unit, an initiating charge and an output receiving-transmitting unit. The input and output nodes of the reception and transmission are made according to the patent for the invention RU 2276319 (description of publ. 10.05.06,). In addition, the output node of the transmission can be made according to the patent for utility model RU 88125 (publ. 10.27.09). The claimed device operates as follows.

When activated by the initial fire pulse, the igniter 1 transfers the combustion products to the input receiving-transmitting unit 2, in which they are transferred from the receiving charge through the partition to the ignition one. When the igniter charge of the input receiving-transmitting unit 2 is burned, gaseous products are formed that activate the initiating charge 3 and simultaneously pass through the fire tube 5 and activate the output receiving-transmitting unit 6; they press the partition of the input unit to the solid combustion products of the receiving charge, which further compacts the latter and eliminates the removal of combustion products through the input transmission and reception unit. When igniting the initiating charge 3, the resulting gaseous products, passing through the perforated tube 4, use the working charge 7 of the gas generator. The output node of the transmit-receive 6, acting similarly to the input node 2, creates the impulse and force of the flame necessary to activate the working charge located outside the body 8 of the gas generator.

Claims (1)

An initiating pulse transmission device, including an igniter, activated from the initial impulse, initiating a charge of a pyrotechnic composition, made in the form of a cylinder, which is placed in a perforated tube, at each of the ends of which a firing pulse transmitting and receiving unit is installed, characterized in that the initiating charge is made with a central axial channel in which the fire tube is installed, and the fire pulse receiving and transmitting units are made in the form of pyrotechnic check valves Wii.