Electric means of ignition, electric igniters and electric igniters, are designed for the same purposes as Icapsule igniters, acting from mechanical impulses.
Electric means of ignition, electric igniters and electric igniters, purpose and device.
The action of electric igniters occurs due to the conversion of electrical energy into heat. Depending on the method of converting electrical energy into heat, there are three types of electrozaps:
Bridge electric igniters, electric igniters.
Slotted Electric Fuses.
Electric spark sparks.
Bridge electric igniters.
They have a filament bridge made of thin wire surrounded by an igniter composition. When current is passed through the bridge, the latter heats up (Joule heat), and when a certain temperature is reached, the composition ignites. All this is placed in a sleeve with an insulator. The ignition current of 0.6-4.0 A is supplied through conductors..
Slit electric igniters.
They also operate due to Joule heat, but the role of the bridge is played by the igniter composition itself, which is made electrically conductive by impregnating the metal by adding metal fuel (for example aluminum) to it. This type of electric igniter has limited use..
In spark electric igniters, ignition is carried out by an electric spark that occurs in the spark gap between open conductors in an ignition composition that does not conduct electric current.
To operate spark igniters, a voltage supply is required. This type of electric igniter is characterized by a very short response time (3-5 μs), is not sensitive to stray currents, and therefore safer than bridge. They are highly reliable since there is no danger of bridge breakage..
The use of electric igniters.
The use of electric igniters in practice determines their three types:
Subversive electric igniters.
Tube electric igniters.
Subversive electric igniters.
Used in disruptive business to actuate fuse chains of engineering ammunition and subversive charges.
Cartridge (electric igniter caps) electric igniters.
Used in barrel artillery in reactive systems to ignite propellant and missile charges.
Tubular (electric igniter caps) electric igniters.
Used in explosive devices of various ammunition.
All these elektrozapali predominantly bridge type. One from the other, they differ in size, shape, method of fastening the bridge, electrical parameters. For example, tube electrostocks have a rigid bridge fastening, eliminating its breakage under the action of inertia forces at the time of the shot.
In order to increase the reliability of action, duplication of electric igniters in one product is usually performed. As heat sources for driving electric igniters, blasting machines (KPMs), batteries, dry batteries, a lighting network, mobile power plants and special on-board power sources are used: batteries, piezoelectric generators and others.
Based on the book Explosives and gunpowder.
A.N. Kalyazhenkov, D.P. Malgin.