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Bridgeless ignitior

A technology of ignition head and ignition wire, applied in the direction of combustion ignition, ignition by electric spark, combustion method, etc., can solve the problems of low ignition reliability, low ignition rate, low reliability, etc., and achieve excellent thermal stability and mechanical Wear-resistant electrical insulation performance, good mechanical wear resistance, moderate electrostatic sensitivity

Inactive Publication Date: 2006-06-28
中国航天科技集团公司第四研究院第四十二所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current ignition method of pyrotechnics, the bridgeless ignition head is gradually expanding its application field due to the simple excitation device required and relatively low cost. Vinyl or lacquer is used as an insulator. When making and using an ignition head, the insulator is easily scratched or twisted. When the ignition head is ignited by a device that generates high-voltage discharge, such as a piezoelectric ceramic, the current flows from the scratched or twisted place. Leakage reduces the ignition reliability of the ignition head, and such small damage is generally difficult to observe and eliminate. During the initiation process of pyrotechnics, such as the process of igniting the oxygen production process of the chlorate oxygen column gas generator, chemical reactions occur The generated high temperature is easy to melt and burn the polyethylene insulator to produce toxic gas, and it is easy to leak at the connection of the ignition head, and the wire core of the bridgeless ignition head generally uses a copper wire conductor as the core material, and its resistance is high. The current that can pass is relatively low, and sometimes requires higher current and high temperature resistance requirements; in addition, the ignition charge of the bridgeless ignition head generally uses carbon and Pb (CNS) 2 The formula of the ignition head reduces the firing rate of the ignition head because the ignition rate is too slow or becomes a conductor at high voltage
Therefore, the traditional bridgeless ignition head has low ignition reliability due to the defects of the materials used, and the general ignition success rate is 80%. Lower reliability; seriously affected the popularization and application of bridgeless ignition head

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] Nickel-plated copper wire is used as the conductor, and polytetrafluoroethylene with a thickness of 0.1mm is used as the insulating layer. The ignition bridge head adopts the ignition powder formula based on lead styphate, and the specific mass percentage formula is: lead styphate 50%, barium nitrate 48%, magnesium powder and aluminum powder combined total 2%.

[0017] The distance between the poles of the two wires of the ignition head is 1 mm; 100 rounds each at a low temperature of -40°C, a normal temperature of +23°C and a high temperature of +80°C, all of which were ignited normally with piezoelectric ceramics. 100 rounds were placed at high temperature +100°C for 2 hours and then dropped to normal temperature, all of which were ignited normally when triggered by piezoelectric ceramics.

Embodiment 2

[0019] Tinned copper wire is used as the conductor, and polyfluoroethylene propylene with a thickness of 0.0.5mm is used as the insulating layer. The ignition bridge head adopts the ignition powder formula based on lead styphate, and the specific mass percentage formula is: 75% lead styphate, Sodium perchlorate 23%, magnesium powder, aluminum powder and sulfur powder combined total 2%.

[0020] The pole distance between the two wires of the ignition head is 1.5mm; 100 rounds each at a low temperature of -40°C, a normal temperature of +23°C and a high temperature of +80°C, all of which are ignited normally with piezoelectric ceramics. 100 rounds were placed at high temperature +100°C for 2 hours and then dropped to normal temperature, all of which were ignited normally when triggered by piezoelectric ceramics.

Embodiment 3

[0022] Silver-plated copper wire is used as the conductor, and polyperfluoroethylene propylene with a thickness of 0.2mm is used as the insulating layer. The ignition bridge head adopts the ignition powder formula based on lead styphate, and the specific mass percentage formula is: lead styphate and azide The eutectic of lead chloride is 35%, the total of magnesium nitrate and sodium chlorate is 63%, and the combination of titanium powder, aluminum powder and sulfur powder is 2%.

[0023] The pole distance between the two wires of the ignition head is 2 mm; 100 rounds each at low temperature -40°C, normal temperature +23°C and high temperature +80°C, all of which are ignited normally with piezoelectric ceramics. 100 rounds were placed at high temperature +100°C for 2 hours and then dropped to normal temperature, all of which were ignited normally when triggered by piezoelectric ceramics.

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Abstract

The invention is a bridge-free igniter head, adopting meltable teflon or other fluorine plastics such as PTEF or FEP with short-time temperature resistance up to 200 deg.C-300 deg.C as lead insulator, having good insulating property and flexibility and excellent thermal stability, mechanical wearability and electric insulating property, strong acid and strong alkali resistance, corrosion resistance, fire resistance and incombustibility, unaging property, and unbreakable, thus avoiding discharging at the lead breakage; adopting high temperature resistant, lower-resistance, nickel-, silver- and tin- plated copper conductor as lead core material, according with high temperature resisting requirements all the more; adopting an igniter formula of high-flame sensitivity, moderate-static sensitivity, good-high temperature ageing property Stefan lead or eutectic mixture of Stefan lead and lead nitrine. The invention is reliable and has good igniting effect.

Description

technical field [0001] The invention relates to a bridgeless ignition head used in the ignition of pyrotechnics. Background technique [0002] In the current ignition method of pyrotechnics, the bridgeless ignition head is gradually expanding its application field due to the simple excitation device required and relatively low cost. Vinyl or lacquer is used as an insulator. When making and using an ignition head, the insulator is easily scratched or twisted. When the ignition head is ignited by a device that generates high-voltage discharge, such as a piezoelectric ceramic, the current flows from the scratched or twisted place. Leakage reduces the ignition reliability of the ignition head, and such small damage is generally difficult to observe and eliminate. During the initiation process of pyrotechnics, such as the process of igniting the oxygen production process of the chlorate oxygen column gas generator, chemical reactions occur The generated high temperature is easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23Q3/00
Inventor 姚俊张文龙孟绍勇陶自成
Owner 中国航天科技集团公司第四研究院第四十二所
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