Plasma ignition electric detonator
A plasma and thermal power technology, applied in the field of electric detonators, can solve problems such as long detonation time, accidental explosion accidents, and inability to meet the requirements of different environments, so as to fill the technical gap and improve the antistatic effect
Active Publication Date: 2010-03-17
HENGYANG TRANSISTOR
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Problems solved by technology
Because the flame that ignites the ignition powder is spherical and radioactively transmits freely in the detonator cavity, only a small part of the flame can transfer energy through the fire transmission hole, so the detonation time is too long
In addition, because the ignition powder and priming powder of the electric detonator are formulated with extremely sensitive chemical agents, they are very sensitive to external factors such as electrostatic induction, electromagnetic radiation, ionizing radiation, electromagnetic waves and stray currents, resulting in the production, transportation, storage, etc. , Accidental explosion accidents are prone to occur during use, and cannot meet the requirements of different environments
Method used
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[0009] Now, the present invention will be described in detail in conjunction with the embodiments shown in the accompanying drawings.
[0010] As shown in the figure, the plasma ignition electric detonator includes a tube shell 1, a bottom charge 2, a loose charge 3, a priming charge 4, and a reinforced cap 6 with a fire transmission hole 5 that are loaded into the tube shell 1 in turn, and its ignition device is composed of Inverted cylinder-shaped double pit base 7, polysilicon plasma ignition chip 8, and outer shield 9 are composed. The middle of the top surface of the base 7 corresponds to the fire transmission holes 5 on the reinforced cap 6, which are successively concaved to form circular upper pits. 10. Square lower pit 11, polysilicon plasma ignition chip 8 from bottom to top are monocrystalline silicon substrate 12, insulating dielectric bottom layer 13, polycrystalline silicon quality block 14 with thin film layer outside, insulating dielectric layer 15, metal thin f...
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The invention relates to a plasma ignition electric detonator, which is characterized in that an ignition device comprises a base provided with an upper concave pit and a lower concave pit which are formed by a top surface denting downwards, a polysilicon plasma ignition chip and an external protective cover; the chip is stuck in the lower concave pit of the base; the chip and an electrode conductive piece thereof are encapsulated in the base; the upper top surface of the external protective cover is provided with an fire ejection port corresponding to the upper concave pit of the base; and the external protective cover is blocked outside the base. Under the action of electric pulse excitation, the mass blocks of the polysilicon is instantly melted from solid to liquid and then gasified into gas to form high-temperature and high-pressure polysilicon impactive plasma through the constraint of the two concave pits; the polysilicon plasma which is hemispherically ejected is constrained by the upper concave pit and enters a linear accelerating chamber to finish accelerated ejection so as to ignite the detonator instantly. The invention has short action time, improves the anti-interference ability, has safety and reliability, can be used in different environments, and is suitable for automatic large-scale production.
Description
technical field [0001] The invention relates to an electric detonator, in particular to a plasma ignition electric detonator. Background technique [0002] At present, in the ignition device of civilian electric detonators, the ignition element is to coat a layer of chemical reagents on the thermal bridge wire, and heat the bridge wire through a large current in the bridge wire to ignite the ignition powder, primer, loose charge, The bottom pill, and finally the detonator exploded. Because the flame that ignites the ignition powder is spherical and radioactively transmits freely in the detonator cavity, only a small part of the flame can transfer energy through the fire transmission hole, so the detonation time is too long. In addition, because the ignition powder and priming powder of the electric detonator are formulated with extremely sensitive chemical agents, they are very sensitive to external factors such as electrostatic induction, electromagnetic radiation, ionizin...
Claims
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Inventor 费凡李爱夫
Owner HENGYANG TRANSISTOR