CN103499253A - Low-ignition-voltage miniature detonator - Google Patents
Low-ignition-voltage miniature detonator Download PDFInfo
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- CN103499253A CN103499253A CN201310468225.5A CN201310468225A CN103499253A CN 103499253 A CN103499253 A CN 103499253A CN 201310468225 A CN201310468225 A CN 201310468225A CN 103499253 A CN103499253 A CN 103499253A
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Abstract
The patent of the invention discloses a low-ignition-voltage miniature detonator. The low-ignition-voltage miniature detonator mainly comprises a foot line, a ceramic electrode plug, a detonator shell, a semiconductor bridge chip, an ignition explosive, a primary explosive and a high explosive. The HMX high explosive and the carboxymethyl cellulose lead azide primary explosive are sequentially pressed into the detonator shell to increase the axial output power of the miniature detonator, and a semiconductor bridge ignition component is fixed at a mouth part of the detonator shell by performing a detonator shell necking-in process and coating a sealant at the mouth part. The technical indicators of the miniature detonator disclosed by the invention are characterized in that the minimum full-ignition voltage is as low as 3.83V (10 micro F), the minimum full-ignition energy is 0.074mJ, the safe current is not less than 200mA, the size of the detonator is not more than phi 2.5*4 mm, and when the output detonation pressure of the detonator is tested by a manganin pressure gauge, the maximum output power of the miniature detonator achieves 10-12 GPa. Compared with the technical indicators of an existing bridge wire type electric detonator, the comprehensive performance of the detonator is improved. The low-ignition voltage miniature detonator disclosed by the invention is suitable for design of explosive trains of low-ignition-voltage micro-electromechanical systems.
Description
Affiliated technical field
Patent of the present invention relates to a kind of Miniature detonator, especially can low get angry under the voltage initial conditions reliably get angry, the semiconductive bridge Miniature detonator of volume miniaturization.
Background technology
Detonator is the important component part of ammunition explosive train and engineering explosion explosive train, generally comprises ignition assembly, priming, high explosive and shell.The ignition assembly of tradition detonator generally be take the bridge silk as inverting element, the bridge wire bond connects between two metal payment to a porter, when passing into firing current, the ignition medicine that the heating of bridge silk is ignited and contacted with the bridge silk, the medicine of getting angry is got angry and the priming that ignites, and priming is realized fast after COMBUSTION TO DETONATION TRANSITION can igniting again high explosive and exporting detonation then completing caps function.Existing bridge-wire electric detonator exists significantly not enough in the design and use process: the one, and requiring higher safe current when (as >=100mA), need higher ignition voltage (as >=28V) to reach higher firing energy (as >=10mJ).Like this, for the MEMS that low electric energy, low-voltage are only arranged or in the blasting engineering initiator of a large amount of detonators that need to detonate simultaneously, exist the blasting cap initiation electric energy higher, the problem that the reliability of detonating reduces.The 2nd, in order to reduce ignition voltage, firing current and the firing energy of electric cap, just must reduce the bridge filament diameter of electric cap, increase the heat sensitivity of ignition medicine.But, along with the reduction of firing energy and the raising of igniting sensitivity, the safe current of electric cap also decreases, reduced the ability of antistatic, the anti-electromagnetic interference of electric cap, the sacrificing security of take improves Fire Reliability as cost.The two designing requirement is the contradiction of a pair of mutual opposition, adopts bridge-wire electric detonator to be difficult to meet better the unify growth requirement of engineering explosion of micro-electro-mechanical systems.Therefore, low to get angry electric cap that voltage, low firing energy possesses higher safe current simultaneously be the unify bottleneck of engineering explosion art development of micro-electro-mechanical systems in development.
Along with the application of MEMS in recent years, also more and more less to the dimensional requirement of electric cap.The electric cap minimum dimension of existing mature technology is Ф 2.5 * 6.47mm, can on steel plate, form the fried hole that the degree of depth is greater than 0.13mm.And, for micro-electro-mechanical system design, need electric cap height or diameter further to reduce, and can reduce electric cap cavity volume size on the one hand, also can reduce the flame proof block board thickness simultaneously.Electric cap height and diameter often reduce 0.1mm, all can make great dimensional space and technical benefits for the design of its component part of micro-electro-mechanical systems irrespective of size and processing.Therefore, reduce the electric cap height and reduce the technical need that block board thickness is the microminiaturized development of MEMS.Reduce the electric cap height, improve detonator and axially export power and reduce contradiction and the technical bottleneck that the flame proof block board thickness is mutual opposition in the design of MEMS explosive train.
Can say that existing traditional axle silk formula detonator, although easily reach the requirement of low ignition electric energy, is difficult to possess the composite requests such as electromagnetic security is good, the time of ignition is short, volume is little, firm in structure, the output power is large simultaneously.If adopt semiconductive bridge assembly, shell and energetic material, the parameters such as low firing energy, bob fire time, microstructure size all are difficult to meet the specification requirement of above-mentioned MEMS.The ignition voltage, safe current, physical dimension, output power etc. that design electric cap according to the requirement of MEMS have become the technical bottleneck of Miniature detonator development.Want to reach the specification requirement of MEMS, prior art combination in simple employing document is to be difficult to realize, also need the prioritization scheme combination by semiconductive bridge transducing unit, miniature ceramic electrode plug, charging explosive in detonator structure, energetic material performance, explore new design philosophy, could solve above-mentioned technical bottleneck.
Summary of the invention
In order to overcome all deficiencies of above-mentioned technology and product, patent of the present invention provides a kind of and has realized reliably getting angry under low-voltage, safe, size is little, the large Miniature detonator of output power.
Reducing to get angry voltage for existing electric cap, reduce the time of ignition, keep higher safe current, reduce the detonator size, the deficiency existed in design etc. parameters combination and technological difficulties, patent of the present invention is by intensive theoretical calculation analysis and the comprehensive experimental verification of system, through orthogonal test and the design of D-optimization method, a kind of low ignition voltage Miniature detonator is proposed, can not only be at minimum all fire voltage, firing energy, the time of ignition, meet the specification requirement of MEMS to the ignition part on the performances such as safe current, also in the situation that guarantee the output of detonators maximum, greatly reduced the axial and radial dimension of detonator, and can guarantee the structural strength needs.
Patent of the present invention solves the technical scheme that its technical problem adopts:
The function of electrode plug has fixedly semiconductive bridge chip, fixedly payment to a porter concurrently, with shell, is combined to form hermetically-sealed construction, realize electric insulation and heat radiation etc.Adopt considering according to being based on the technical standpoints such as planform moulding, structural strength, electric simulation strength, size microminiaturization of miniature asymmetric ceramic electrode plug.
Miniature asymmetric ceramic electrode plug is by asymmetric payment to a porter hole site layout, trapezoidal groove location layout, and the designs such as electric simulation strength and structural strength check, realize that electrode plug minimized in size and electric simulation strength and structural strength maximize.The electrode plug sample typical sizes realized is: diameter is 2.0～2.2mm, be highly 1.0～1.2mm, its trapezoidal groove minor face length is 0.5～0.55mm, the long length of side is 0.6～0.7mm, limit is high is 0.5～0.6mm, groove depth is 0.6mm, long limit be positioned on the electrode plug symmetrical center line or near, can hold the ignition chip that appearance and size is not more than long 0.5mm * wide 0.5mm * high 0.5mm.
The function of shell is that priming, high explosive and ignition assembly are held in assembling.Adopting the stainless steel shell is to increase shock resistance structure intensity, increase drug-pressuring pressure, increase shock resistance structure intensity, increases detonator and axially exports power.
The function of semiconductive bridge chip is to realize electric energy input and reliable the ignition, and has certain antistatic, anti-radio frequency safety.The foundation of choosing the semiconductive bridge chip of low-voltage ignition is to reduce ignition voltage or firing energy, has again higher safe current simultaneously.It is 3.83V(10 μ F that the semiconductive bridge chip is typically got angry voltage), minimum all fire energy is 0.074mJ, safe current is not less than 200mA.
The function of ignition medicine is accept the input of semiconductive bridge electric detonation energy and get angry.Choose thermal sense get angry medicine according to being further to reduce to get angry voltage, by getting angry the checking that makes a service test of kind, granularity, product type, purity, adhesive and the charging means etc. of medicine, to realize getting angry voltage, minimize.
The function of priming be accept to get angry medicine flame and realize COMBUSTION TO DETONATION TRANSITION fast, ignite the powder charge of next stage high explosive.The foundation that the present invention chooses priming is that the COMBUSTION TO DETONATION TRANSITION distance is the shortest, the powder charge of output detonation energy reliable initiation next stage HMX high explosive, and limit explosive quantity is as much as possible little.
The function of high explosive is to accept the detonation of priming and detonate, and realizes rapid high speed detonation and increases the output power of detonator.The present invention choose high explosive according to being that shock sensitivity is good, critical propagation of explosion diameter is little, the output power is large, technical maturity, can reliable initiation next stage detonator or thick flame proof dividing plate can reliable flame proof by certain the air gap propagation of explosion, 0.8mm high explosive.Be applicable to require the propagation of explosion sequences Design occasion of technology maturation, MEMS that power is larger.
The invention has the beneficial effects as follows: based on to electrode plug, shell, the ignition chip, the ignition medicine, priming and the design of high explosive influence factor and parameter optimization combination, the preferably Miniature detonator structure and performance parameters that the present invention obtains is: detonator is of a size of Ф 2.5 * 4mm, minimum all fire voltage is 3.83V(10 μ F), minimum all fire energy is 0.074mJ, safe current is not less than 200mA, be 12.6～16.5 μ s the time of ignition, the output power reaches 10～12GPa, the flame proof block board thickness is 0.8mm, can be by 0～2.4mm the air gap JO-9c booster explosive detonator that detonates, can meet the combination property requirement of the MEMS of reduced size.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the three-dimensional structure schematic diagram of the miniature ignition assembly of low ignition voltage semiconductor bridge.
Fig. 2 is the top view of the miniature ignition assembly of low ignition voltage semiconductor bridge.
Fig. 3 is the low miniature ignition assembly of the voltage semiconductor bridge A-A cutaway view of getting angry of Fig. 2
Fig. 4 is the structural representation of Miniature detonator.
The specific embodiment
In conjunction with Fig. 1-3, the low miniature ignition assembly of voltage semiconductor bridge of getting angry comprises three parts: semiconductive bridge transducing element chip (1), asymmetric miniature ceramic electrode plug (2) and thermal sense ignition medicine (9).By rectangular shaped semiconductor bridge transducing element chip (1), with binding agent (8), be fixed in the trapezoidal groove (3) of asymmetric ceramic electrode plug (2), adopt the ultrasonic bonding mode, with bonding wire (6, 7) by two metal pads on this semiconductive bridge transducing element chip (1) respectively with the bipod line electrode (4 of ceramic electrode plug (2), 5) connect, make two payment to a porter electrodes (4 of electrode plug, 5) with two metal pad forming circuit paths of semiconductive bridge transducing unit, in semiconductive bridge transducing unit, the filling thermal sense is got angry the neutral lead trinitroresorcinate of medicine (9) refinement and is formed the ignition assembly.
Embodiment shown in Fig. 4 is the semiconductive bridge Miniature detonator that the bottom tube shell mould is arranged, and comprises priming (11), high explosive (12), shell (13) and the part (10) of getting angry.Powder charge is divided into two-layer, and ground floor is priming (11), as the carboxymethyl cellulose lead azide; The second layer is HMX high explosive (12).The charging means powder medicine press-fits, and under 100～120MPa drug-pressuring pressure, the HMX high explosive of 7.7～12.3mg is pressed into to shell, then under 90～100MPa drug-pressuring pressure, the carboxymethyl cellulose lead azide priming of 6.8～17mg is pressed into to shell.Semiconductive bridge ignition assembly is packed into and press-fited in the shell of priming and high explosive, finally by shell bottling technique and oral area, be coated with fluid sealant and make semiconductive bridge ignition assembly be fixed on the oral area composition micro electric detonator of shell.Priming is accepted the flame of ignition assembly and is realized COMBUSTION TO DETONATION TRANSITION, ignites high explosive; High explosive realizes that detonation energy amplifies, the next stage powder charge of the micro-dimension that detonates; Each layer of powder charge of shell splendid attire, and fastening with the fuse structure assembling, play sealing, fastening medicament, ignition assembly and reduce the effect that micro-dimension powder charge detonation energy side direction is lost.
Miniature detonator is the critical component that miniature propagation of explosion sequence realizes COMBUSTION TO DETONATION TRANSITION, and it is got angry voltage and size and is subject to the fuze mechanism size restrictions, thus reasonable design to get angry assembly and structure be the key factor of Miniature detonator design.The semiconductor bridge detonator that the present invention proposes adopts 10 μ F energy storage capacitors to carry out the firing energy test, the minimum all fire voltage that records this micro semiconductor bridge detonator is 3.83V, minimum all fire energy is 0.074mJ, safe current is not less than 200mA, be 12.6～16.5 μ s the time of ignition, maximum 10～the 12GPa that arrives of output power, reduced to greatest extent the ignition voltage of Miniature detonator, and reduced physical dimension, can meet the requirement of the ignition of MEMS low-voltage and security, output detonate lethality and structural strength.
Claims (6)
1. get angry the Miniature detonator of voltage for one kind low, it mainly comprises payment to a porter, the ceramic electrode plug, shell, the semiconductive bridge chip, the ignition medicine, priming, high explosive, it is characterized in that: fix a semiconductive bridge transducing element chip in miniature asymmetric ceramic electrode plug, and two metal pads of semiconductive bridge transducing element chip (1) and two payment to a porter electrodes (4 of electrode plug (2), 5) use bonding wire (6 between, 7) realize that in the ultrasonic bonding mode circuit connects, filling thermal sense ignition medicine (9) above semiconductive bridge transducing unit, be assembled into semiconductive bridge ignition assembly (10), by HMX high explosive and carboxymethyl cellulose lead azide priming, be pressed into successively in shell, finally by shell bottling technique and oral area, being coated with fluid sealant makes semiconductive bridge ignition assembly be fixed on the oral area of shell, wherein the diameter of miniature asymmetric ceramic electrode plug (2) is 2.0～2.2mm, be highly 1.0～1.2mm, its trapezoidal groove minor face length is 0.5～0.55mm, the long length of side is 0.6～0.7mm, limit is high is 0.5～0.6mm, groove depth is 0.6mm, long limit be positioned on the electrode plug symmetrical center line or near, can hold the ignition chip that appearance and size is not more than long 0.5mm * wide 0.5mm * high 0.5mm.
2. the Miniature detonator of low ignition voltage according to claim 1, it is characterized in that: the size of described Miniature detonator is not more than Ф 2.5 * 4mm, and the payment to a porter diameter is 0.3～0.4mm, and payment to a porter length is 20～30mm.
3. the Miniature detonator of low ignition voltage according to claim 1, it is characterized in that: described semiconductor ignition assembly discharges to it by the electric capacity of 10 μ F, the low electric energy that can to reach minimum all fire voltage be 3.83V is got angry requirement, minimum all fire energy is 0.074mJ, and safe current is not less than 200mA.
4. the Miniature detonator of low ignition voltage according to claim 1, it is characterized in that: priming is the carboxymethyl cellulose lead azide, and explosive payload is 6.8～17.0mg, and shot elevation is 0.6～1.5mm, realizes the COMBUSTION TO DETONATION TRANSITION in the quick-fried distance of short pass.
5. the Miniature detonator of low ignition voltage according to claim 1, it is characterized in that: high explosive is HMX, and dose is 7.7～12.3mg, and shot elevation is 1.5～2.4mm, realizes output power maximum under the high condition of minimum medicine, and the output detonation pressure is 10～12GPa.
6. the Miniature detonator of low ignition voltage according to claim 1, it is characterized in that: Miniature detonator can be by 0～2.4mm gap the detonate powder charge of JO-9c booster explosive or the close detonator powder charge of shock sensitivity, and the nickel dividing plate that is not less than 0.8mm with thickness can be realized the reliable flame proof of detonator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310468225.5A CN103499253B (en) | 2013-10-09 | 2013-10-09 | A kind of Miniature detonator of low firing voltage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310468225.5A CN103499253B (en) | 2013-10-09 | 2013-10-09 | A kind of Miniature detonator of low firing voltage |
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| CN103499253A true CN103499253A (en) | 2014-01-08 |
| CN103499253B CN103499253B (en) | 2016-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631424A (en) * | 2019-09-19 | 2019-12-31 | 东北大学 | Detonator type miniature explosive package |
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| US5831203A (en) * | 1997-03-07 | 1998-11-03 | The Ensign-Bickford Company | High impedance semiconductor bridge detonator |
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| CN102853724A (en) * | 2012-10-08 | 2013-01-02 | 南京理工大学 | Transduction component with surface-mounted semi-conductive bridge for electric initiating explosive device |
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2013
- 2013-10-09 CN CN201310468225.5A patent/CN103499253B/en not_active Expired - Fee Related
Patent Citations (5)
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| US5113764A (en) * | 1989-09-25 | 1992-05-19 | Olin Corporation | Semiconductor bridge (SCB) packaging system |
| US5831203A (en) * | 1997-03-07 | 1998-11-03 | The Ensign-Bickford Company | High impedance semiconductor bridge detonator |
| US20030192445A1 (en) * | 2000-05-24 | 2003-10-16 | Auburn University | Electro-explosive device with laminate bridge |
| CN201852529U (en) * | 2010-11-16 | 2011-06-01 | 湖北卫东控股集团有限公司 | Electronic delay semiconductor bridge detonator |
| CN102853724A (en) * | 2012-10-08 | 2013-01-02 | 南京理工大学 | Transduction component with surface-mounted semi-conductive bridge for electric initiating explosive device |
Non-Patent Citations (4)
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| 严谨容: "《半导体桥作用特性及其规律研究》", 《中国优秀硕士学位论文全文数据库》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631424A (en) * | 2019-09-19 | 2019-12-31 | 东北大学 | Detonator type miniature explosive package |
| CN110631424B (en) * | 2019-09-19 | 2022-02-11 | 东北大学 | Detonator type miniature explosive package |
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