CN103925856A - Explosion-wire detonating device - Google Patents
Explosion-wire detonating device Download PDFInfo
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- CN103925856A CN103925856A CN201410135196.5A CN201410135196A CN103925856A CN 103925856 A CN103925856 A CN 103925856A CN 201410135196 A CN201410135196 A CN 201410135196A CN 103925856 A CN103925856 A CN 103925856A
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- blast
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Abstract
The invention provides an explosion-wire detonating device which comprises an expansion loop component, a direct-current high-voltage power supply, an energy storage capacitor set, a sphere gap switch, a trigger and a pulse transformer. One end of an axis metal silver-plated wire is connected with the sphere gap switch through a coaxial cable while the other end of the same is grounded. When the sphere gap switch triggered and connected, energy stored through the energy storage capacitor set is instantly deposited in an axis explosion wire quite small in diameter and is subjected to physical processes like solid heating melting, and liquid heating vaporizing explosion till metal vapor is ionized to form a plasma, the explosion wire simultaneously detonates cylindrically loaded explosives to form a cylindrical detonation wave load driver, and a sampling ring is finally released from the driver and starts free expansion movement. The axis explosion wire is adopted for detonation, so that stability in loading the sampling ring and repeatability of experiment are improved.
Description
Technical field
The present invention relates to a kind of blast silk priming device, be applied to the experiment of explosive expansions ring.
Background technology
Existing explosive expansions ring priming device adopts two-end-point blasting cap initiation mode, detonation wave crashes in powder charge center, the detonation wave pressure that crashes sharply raises, can cause stress state complicated in driver and complicated distortion if directly act on driver, for fear of this problem, explosive and driver are directly reserved to certain gap, wished to wait until after detonation product pressure evenly to reload driver.But along with the increase in gap, the pressure of detonation product is more even, but pressure is lower simultaneously.So will realize detonation product in this experimental provision is very difficult to the uniform load of driver.The problems such as the inhomogeneities in gap, the asymmetry that sample ring is assembled in the axial direction etc. all can affect the speed history that is radially expanded of sample ring, and that both the experiment of traditional explosive expansions ring has existed that sample ring loads is unstable, experimental repeatability is poor.
Summary of the invention
For unstable, the deficiency that experimental repeatability is poor that overcome that sample ring in prior art loads, the invention provides an a kind of blast silk priming device.A blast of the present invention silk priming device adopted axis blast silk thread to detonate and substituted two ends blasting cap initiation, unstable, the problem such as experimental repeatability is poor that have overcome that sample ring that two-end-point blasting cap initiation mode exists loads.
A kind of blast silk priming device of the present invention, is characterized in, described priming device comprises expansion loop assembly, DC high-voltage power supply, energy-storage capacitor group, sphere gap switch, trigger, high voltage pulse transformer; Wherein, expansion loop assembly contains blast copper wire, insulation cover plate, insulating plug, free-flowing dynamite, cartridge, driver, sample ring.Described expansion loop assembly profile is tubular; Its annexation is, described cartridge is fixedly installed in driver, upper end, the lower end of cartridge are respectively arranged with insulating plug, insulation cover plate is arranged on insulating plug, free-flowing dynamite is filled in cartridge, the peripheral transverse center of driver position is provided with sample ring, and blast copper wire is through the axle center of expansion loop assembly; Described cartridge, driver, insulation cover plate, insulating plug are concentric setting; Blast copper wire one end, axle center of described expansion loop assembly is connected with sphere gap switch by coaxial cable, other end ground connection; It is elementary that described trigger connects high voltage pulse transformer, boosts, then be added on the trigger electrode of sphere gap switch through isolation capacitance C1 through high voltage pulse transformer; The top electrode of sphere gap switch is directly connected with the high-pressure side of energy-storage capacitor group, and bottom electrode is by blast copper wire ground connection; Described DC high-voltage source output terminal is connected with energy-storage capacitor group high-pressure side, sphere gap switch upper end.
Described driver sample ring is interference assembling.
Described sphere gap switch is field distortion gas-filled switching tube, and single operating voltage is 200kV, and electric current is 100kA.
Described energy-storage capacitor group is three 4 μ F Capacitance parallel connections, and energy capacitance set high-pressure side adopts respectively copper coin to be connected with earth terminal.
It is secondary that described sphere gap switch trigger electrode one end connects high-tension transformer through capacitor C1, and the other end is connected with two series resistor mid points.
Described sphere gap switch housing adopts nylon material.
Blast of the present invention silk priming device can be within the scope of 10 kV-40 kV reliably working, be expansion loop experiment package output pulse high current.Blast copper wire length can form good cylinder detonation wave or Cylindrical Shock more than can reaching 200 mm.Research shows by experiment: the Dynamic Repeatability of expansion loop assembly is better, for oxygen-free copper sample ring, the maximum deviation that is radially expanded velocity amplitude under identical loading environment is controlled in 7%, therefore on this experiment porch, can be applied to carry out one dimension stretch load under, the dynamic response experiment of becket under plane strain loading environment, post shell, the propagation law of crackle etc. in the dynamic fragmentation rule of the constitutive relation of research material under one dimension high strain rate tensile loads, becket, metal column shell expansion process.
When the large electric current of priming device output high-voltage pulse of the present invention explodes copper wire by expansion loop assembly axle center, produce very high heat and make wire fusing, vaporization suddenly, and finally form plasma, so that sharply compress surrounding medium and produce shock wave, the too high explosive of peace and so on detonates under the comprehensive function of heat and shock wave.Detonate with blast thread, in experimental provision, form cylinder detonation wave, uniform load driver, the detonation wave of having avoided crashing loads the unstability of bringing.Low resistivity materials isolation explosive and metal driving device are set in the present invention, reduce on-load pressure, can improve like this assembly precision, improve the axial symmetry of experimental provision, increase the uniformity that sample ring loads.Blast silk priming device of the present invention has adopted axis blast silk thread to detonate, and has improved stability and experimental repeatability that sample ring loads.
Brief description of the drawings
Fig. 1 is the explode electric principle schematic of a priming device of the present invention;
Fig. 2 is the expansion loop modular construction schematic diagram that the present invention is exploded in a priming device;
Fig. 3 is the current waveform figure of the blast copper wire in the present invention;
Fig. 4 is the blast copper wire current waveform figure that has expansion loop assembly in the present invention;
In figure: 1. blast copper wire 2. insulation cover plate 3. insulating plug 4. free-flowing dynamite 5. cartridge 6. driver 7. sample ring.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further detailed.
Embodiment 1
Fig. 1 is the explode electric principle schematic of a priming device of the present invention, and Fig. 2 is the expansion loop modular construction schematic diagram that the present invention is exploded in a priming device.
In Fig. 1,2, blast silk priming device of the present invention, comprises expansion loop assembly, DC high-voltage power supply, energy-storage capacitor group, sphere gap switch, trigger, high voltage pulse transformer; Wherein, expansion loop assembly contains blast copper wire 1, insulation cover plate 2, insulating plug 3, free-flowing dynamite 4, cartridge 5, driver 6, sample ring 7.Described expansion loop assembly profile is tubular; Its annexation is, described cartridge 5 is fixedly installed in driver 6, the upper end of cartridge 5, lower end are respectively arranged with insulating plug 3, insulation cover plate 2 is arranged on insulating plug 3, free-flowing dynamite 4 is filled in cartridge 5, the peripheral transverse center of driver 6 position is provided with sample ring 7, and blast copper wire 1 is through the axle center of expansion loop assembly; Described cartridge 5, driver 6, insulation cover plate 2, insulating plug 3 are concentric setting; Blast copper wire 1 one end in described expansion loop assembly axle center is connected with sphere gap switch by coaxial cable, other end ground connection.It is elementary that described trigger connects high voltage pulse transformer, boosts, then be added on the trigger electrode of sphere gap switch through isolation capacitance C1 through high voltage pulse transformer; The top electrode of sphere gap switch is directly connected with the high-pressure side of energy-storage capacitor group, and bottom electrode is by blast copper wire 1 ground connection; Described DC high-voltage source output terminal is connected with energy-storage capacitor group high-pressure side, sphere gap switch upper end.
Described driver 6 is interference assembling with sample ring 7.
Described sphere gap switch is field distortion gas-filled switching tube, and single operating voltage is 200kV, and electric current is 100kA.
Described energy-storage capacitor group is three 4 μ F Capacitance parallel connections, and storage capacitor high-pressure side adopts respectively copper coin to be connected with earth terminal.
It is secondary that described sphere gap switch trigger electrode one end connects high-tension transformer through capacitor C1, and the other end is connected with two series resistor mid points.。
In the present embodiment, sphere gap switch case material is nylon.
Blast silk priming device of the present invention, in the time that sphere gap switch is triggered conducting, instantaneous being deposited on the blast copper wire 1 that diameter is very thin of energy that energy-storage capacitor group stores, under current flow heats effect, through physical processes such as solid-state heating and melting, liquid heating vaporization blasts, form plasma until ionization occurs metal gas.The simultaneous initiation cylindricality powder charge on axis of blast copper wire 1, form cylinder detonation wave load driver device, Cylindrical Shock passes in sample ring through driver, in the time that sample ring scope of freedom radiation rarefaction wave arrives sample ring 7 with driver interface, sample ring 7 is thrown off with driver, and sample ring 7 starts free wxpansion campaign.
Fig. 1 is the explode electric principle schematic of a priming device of the present invention.Blast silk priming device comprises expansion loop assembly, DC high-voltage power supply, energy-storage capacitor group, sphere gap switch, trigger, pulse transformer, electric ground switch, biasing resistor R1, biasing resistor R2, current-limiting protection resistance R 4, isolation capacitance C1.Trigger output 1.5kV pulse signal, boosts and is added on the trigger electrode of switch through isolation capacitance C1 through the high voltage pulse transformer of 1:40; Sphere gap switch is field distortion gas-filled switching tube, and single operating voltage and electric current can reach 200kV/100kA; Energy-storage capacitor group adopts 3 parallel connections of low sense impulse capacitor, every 4 μ F/50 kV, total capacitance 12 μ F.Biasing resistor R1, biasing resistor R2 are 100M Ω, and resistance R 3 is 30K Ω, and resistance R 4 is 1M Ω.
In Fig. 2, blast copper wire 1 diameter is 0.2 mm, and length can be determined as required; The effect of insulation cover plate 2 and insulating plug 3 is all to discharge between prevent exploding silk and driver, adopts the good material of insulating properties; Free-flowing dynamite 4 selects to detonate the lower too peace powder of threshold value, and loading density can regulate among a small circle, and loading density scope is about 1.0 g/cm3～1.2 g/cm3; Cartridge 5 is selected the good material of insulating properties, as lucite etc.Cartridge length is greater than driver, and driver 6 material requires have preferably dynamically ductility, in experimentation, remain intact as far as possible, material select will with sample ring match materials, preferably the acoustic impedance of actuator material is more bigger than the acoustic impedance of sample ring material.Expansion loop component assembling process is as follows: in cartridge 5, load free-flowing dynamite 4, blast copper wire 1 is placed in free-flowing dynamite 4 centers, insulating plug 3 is pressed on cartridge 5 two ends, subsequently blast copper wire 1, insulating plug 3, free-flowing dynamite 4, cartridge 5 entirety are put among driver 6, and using insulation cover plate 2 to compress at two ends, driver 6 adopts interference assembling with sample ring 7.
After expansion loop component assembling in the present invention is good, blast copper wire one end, axle center of expansion loop assembly connects sphere gap switch, other end ground connection; Storage capacitor is 34 μ F Capacitance parallel connections, and energy-storage capacitor group high-pressure side adopts respectively the copper coin of 6 × 50mm to be connected with earth terminal, is about 1.3m, the about 0.2m of two ends spacing, and high-pressure side connects sphere gap switch and DC high-voltage power supply anode, other end ground connection; Sphere gap switch is field distortion gas-filled switching tube, switch case material is nylon, switch is installed and used front reply nylon material pumping high vacuum, the top electrode of sphere gap switch is directly connected with energy-storage capacitor high-pressure side, bottom electrode is by the blast copper wire ground connection in expansion loop assembly, it is secondary that switch triggering utmost point one end connects high-tension transformer through capacitor C1, and the bias voltage providing is provided two resistance that a termination resistance is 100M Ω; It is elementary that trigger connects pulse transformer; Electric ground switch high pressure termination DC power output end and storage capacitor high-pressure side, earth terminal reliable ground.
Fig. 3 is the current waveform figure of the blast copper wire in the present invention, and Fig. 3 is the current waveform figure that is only provided with blast copper wire.
Fig. 4 is the blast copper wire current waveform figure that is provided with expansion loop assembly in the present invention.
From Fig. 3, Fig. 4, can find out there is the waveform of expansion loop assembly and is only provided with compared with the current waveform of blast silk, reduce cycle of oscillation, amplitude reduces.
Claims (6)
1. a blast silk priming device, is characterized in that: described priming device comprises expansion loop assembly, DC high-voltage power supply, energy-storage capacitor group, sphere gap switch, trigger, high voltage pulse transformer; Wherein, expansion loop assembly contains blast copper wire (1), insulation cover plate (2), insulating plug (3), free-flowing dynamite (4), cartridge (5), driver (6), sample ring (7); Described expansion loop assembly profile is tubular; Its annexation is, described cartridge (5) is fixedly installed in driver (6), upper end, the lower end of cartridge (5) is respectively arranged with insulating plug (3), insulation cover plate (2) is arranged on insulating plug (3), free-flowing dynamite (4) is filled in cartridge (5), the peripheral transverse center of driver (6) position is provided with sample ring (7), and blast copper wire (1) is through the axle center of expansion loop assembly; Described cartridge (5), driver (6), insulation cover plate (2), insulating plug (3) are concentric setting; Blast copper wire (1) one end in described expansion loop assembly axle center is connected with sphere gap switch by coaxial cable, other end ground connection; It is elementary that described trigger connects high voltage pulse transformer, boosts, then be added on the trigger electrode of sphere gap switch through isolation capacitance C1 through high voltage pulse transformer; The top electrode of sphere gap switch is directly connected with the high-pressure side of energy-storage capacitor group, and bottom electrode is by blast copper wire (1) ground connection; Described DC high-voltage source output terminal is connected with energy-storage capacitor group high-pressure side, sphere gap switch upper end.
2. blast silk priming device according to claim 1, is characterized in that: described driver (6) is interference assembling with sample ring (7).
3. blast silk priming device according to claim 1, is characterized in that: described sphere gap switch is field distortion gas-filled switching tube, and single operating voltage is 200kV, and electric current is 100kA.
4. blast silk priming device according to claim 1, is characterized in that: described energy-storage capacitor group is three 4 μ F Capacitance parallel connections, and storage capacitor high-pressure side adopts respectively copper coin to be connected with earth terminal.
5. blast silk priming device according to claim 1, is characterized in that: it is secondary that described sphere gap switch trigger electrode one end connects high-tension transformer through capacitor C1, and the other end is connected with two series resistor mid points.
6. blast silk priming device according to claim 1, is characterized in that: described sphere gap switch housing adopts nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410135196.5A CN103925856A (en) | 2014-04-04 | 2014-04-04 | Explosion-wire detonating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410135196.5A CN103925856A (en) | 2014-04-04 | 2014-04-04 | Explosion-wire detonating device |
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| CN103925856A true CN103925856A (en) | 2014-07-16 |
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| CN201410135196.5A Pending CN103925856A (en) | 2014-04-04 | 2014-04-04 | Explosion-wire detonating device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478112A (en) * | 2017-09-21 | 2017-12-15 | 中国工程物理研究院电子工程研究所 | A kind of highly reliable in-line arrangement fuse and its control method |
| CN109556467A (en) * | 2018-12-19 | 2019-04-02 | 贵州航天电子科技有限公司 | A kind of miniaturization safety and firing mechanism initiation control circuit |
| CN110933829A (en) * | 2019-12-06 | 2020-03-27 | 西安交通大学 | Multi-channel plasma jet device and method based on micro-cavity metal wire electric explosion |
| CN115014139A (en) * | 2022-06-15 | 2022-09-06 | 安徽工业大学 | Electromagnetic pulse blasting system and method |
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| CN102680338A (en) * | 2012-05-10 | 2012-09-19 | 宁波大学 | Impact expansion loop experiment device and method based on Hopkinson pressure rod |
| RU2507498C1 (en) * | 2012-08-01 | 2014-02-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет" (СПбГУ) | Method to test mechanical properties of structural materials under conditions of shock stress and device for its realisation |
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2014
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| CN102680338A (en) * | 2012-05-10 | 2012-09-19 | 宁波大学 | Impact expansion loop experiment device and method based on Hopkinson pressure rod |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478112A (en) * | 2017-09-21 | 2017-12-15 | 中国工程物理研究院电子工程研究所 | A kind of highly reliable in-line arrangement fuse and its control method |
| CN107478112B (en) * | 2017-09-21 | 2023-07-04 | 中国工程物理研究院电子工程研究所 | High-reliability in-line fuse and control method thereof |
| CN109556467A (en) * | 2018-12-19 | 2019-04-02 | 贵州航天电子科技有限公司 | A kind of miniaturization safety and firing mechanism initiation control circuit |
| CN110933829A (en) * | 2019-12-06 | 2020-03-27 | 西安交通大学 | Multi-channel plasma jet device and method based on micro-cavity metal wire electric explosion |
| CN110933829B (en) * | 2019-12-06 | 2020-12-25 | 西安交通大学 | Multi-channel plasma jet device and method based on micro-cavity metal wire electric explosion |
| CN115014139A (en) * | 2022-06-15 | 2022-09-06 | 安徽工业大学 | Electromagnetic pulse blasting system and method |
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Application publication date: 20140716 |