CN204461249U - The high-effect electrostatic defending bridge-wire electric detonator of a kind of TVS pipe type - Google Patents
The high-effect electrostatic defending bridge-wire electric detonator of a kind of TVS pipe type Download PDFInfo
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- CN204461249U CN204461249U CN201420692478.0U CN201420692478U CN204461249U CN 204461249 U CN204461249 U CN 204461249U CN 201420692478 U CN201420692478 U CN 201420692478U CN 204461249 U CN204461249 U CN 204461249U
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Abstract
The utility model relates to the high-effect electrostatic defending bridge-wire electric detonator of a kind of TVS pipe type, comprises electrode plug, bridge silk, ignition medicine, priming, high explosive, strengthening cap, capsule, the efficient antistatic assembly of disc.Described high efficiency electrostatic guard assembly connects and composes pin-pin electrostatic leakage passage by disc electrostatic defending PCB and electric cap both feet line circuit, connects and composes pin-shell electrostatic leakage passage with shell circuit.High efficiency electrostatic guard assembly of the present utility model, by pin-pin electrostatic protection device and pin-shell electrostatic protection device, also has pin-shell electrostatic leakage passage that multiple wedge angle air-gap is formed, and forms electrostatic defending dual fail-safe leakage path.Protection electrostatic component employing TVS pipe of the present utility model, can realize pin-shell and pin-pin electrostatic defending reaches and is greater than 50kV, no matter is protect at pin-shell or can both stand the repeat impact of static discharge and any performance change can not occur on pin-foot protection.
Description
Art
Patent of the present invention belongs to electric cap guard technology, particularly a kind of high-effect electrostatic defending technology of electric cap of anti-extreme static electricity on human body's environment.
Background technology
Electric cap is the important detonation element that in engineering explosion, destructor is ignited or weapons and ammunitions explosive train is ignited, and in electric cap, conventional scorching hot bridge silk element is as electric transducer element.Bridge wire bond is connected between electric cap two plain conductor ends, when passing into firing current, bridge silk realizes the electric heating conversion of electric initiating control signal (firing current), bridge silk heat-dissipating produces high temperature, ignite the ignition medicine contacted with it, send out order after pyrophoric ignition to ignite delay powder, priming, high explosive, complete the function of the detonating of electric cap, delays time to control and output shock wave.
Existing bridge-wire electric detonator be in use easily subject to electrostatic, radio frequency, stray electrical current impact and meet accident ignition or performance degradation.In the process such as production, assembling, storage, transport, operation and maintenance of electric spark workpiece and destructor, the harm ubiquity of static discharge is the modal dangerous matter sources causing electric spark workpiece accidental ignition.Static discharge has high voltage, the feature of low-yield, high transient state, the coupling of electrostatic discharge energies may impact the ignition quality of electric spark workpiece and security performance, even causes misfire or accidental ignition, and system task cannot be completed or cause casualties.ESD test proves, even insensitiveness electric spark workpiece also may produce damage or get angry when standing 25kV electrostatic impact, those sensitive electrical priming systems are then faced with severeer electrostatic and threaten.
The existing electrostatic defending technological approaches of electric cap has, adopt between pin-shell and insulating materials is set to improve its dielectric strength, thus raising electrostatic breakdown voltage, or the electrostatic leakage passage such as air-gap, painting conducting resinl is set between pin-shell to improve the antistatic capacity of pin-shell; And the raising of the antistatic effect of pin-pin only has technical measures such as increasing bridge filament diameter, increase bridging plug contact area, raising ignition medicine bursting point at present.By one of above electrostatic defending technological approaches or combination, thus electric cap is made to reach the security requirement of the human body electrostatic 25kV that the standard such as GJB5309.14-2004 " priming system test method the 14th part: ESD test ", MIL-DTL-23659F-2010 " electric initiator universal design specification ", GBT8031-2005 " commercial electric detonator " specifies.But along with the electrostatic environment in industrial application occasion and battlefield, the enhancing day by day of electromagnetic environment interference, along with people improve the understanding of electrostatic interaction mechanism, it is found that the safety indexes of the maximum static electricity on human body's voltage (military electric spark workpiece be 25kV, civilian electric cap be 10kV) formulated in traditional industrial standard and military standard can not cover, meet the environment for use requirement of modern priming system completely, static electricity on human body's environment the harshest can not be represented.As Ordnance Engineering College Liu Shang closes the extreme body voltages Data-Statistics result of academician and U.S. Sang Diya laboratory, IEEE-USA's report, wherein " Britain's antistatic general specification " is 50kV, " U.S.'s protection test handbook " is 40kV, " the international electrostatic meeting in Beijing " is 35kV ~ 50kV, and Ordnance Engineering College's result of study is 60kV.And rarely have report about the analysis of electric spark workpiece safety testing and theory analysis under these stationary electrode end value effects.In addition, electric spark workpiece is inevitably subject to repeatedly electrostatic impact in the middle of the processes such as use, transport, be reported in the mode being coated with conducting resinl between pin-shell at present to carry out protection base-shell electrostatic hazard and can reach antistatic 25kV, but after high-pressure electrostatic effect 3 times, the protection effect of conducting resinl can reduce greatly, and multiple discharge even can cause conducting resinl to lose antistatic capacity.Therefore this just requires to find and a kind ofly can protect higher electrostatic potential, is subject to the technical scheme that repeatedly electrostatic impact rear protecting effect is constant, particularly can realize the microminiaturized protective device protected to sensitive electrical priming system pin-pin loop.
Electrostatic prevention structure disclosed in Chinese patent CN201210540239.9 is at detonator rear end extrapolation transverse discharge metal connecting piece, and size is comparatively large, inapplicable long payment to a porter or small size detonator.Adopt crimping mode to be connected between metal connecting piece with detonator payment to a porter, easily cause electrode delamination and protection circuit open circuit, electrostatic discharge protective circuit was lost efficacy.Outside plug type discharge metal connector promotes the manufacturing process difficulty of detonator, if easily cause accidental ignition in the shaping rear extrapolation of detonator and cause danger, and in the shaping front extrapolation of detonator, very large inconvenience and trouble are brought for the manufacturing process of detonator, extrapolation transverse discharge metal connecting piece brings restriction can to the use of detonator simultaneously, when guided missile high overload, the horizontal large circuit board of extrapolation is easy to come off to System's composition danger, and when not having unnecessary usage space, the horizontal large circuit board of extrapolation will bring danger to whole system.And this patent does not illustrate the protection effect of electrostatic.
Electrostatic prevention structure disclosed in Chinese patent CN201220055188.6 is only in semiconductor bridge detonator, and only select 1 corner discharge when protection base-shell electrostatic, because product can discharge to product through at least 3 to 5 person-times in transport, assembling process, once may cause fusing distortion to sawtooth after electric discharge, thus losing electrostatic defending effect, multiple discharge can be caused danger after impacting; Described patent does not provide protection effect simultaneously, does not also propose to carry out anti-repeatedly electrostatic impact, does not more propose the size of product size.
Summary of the invention
In order to anti-higher than 25kV electrostatic potential and repeatedly electrostatic impact, patent of the present invention provides a kind of bridge-wire electric detonator scheme that can resist extreme static electricity on human body's environment, it not only can effective protection base-shell high voltage electrostatic discharge, and can also protect pin-pin static discharge, repeatedly electrostatic impact can also be stood simultaneously.
Patent of the present invention solves the technical scheme that its technical problem adopts:
Place a high-effect electrostatic defending assembly of wafer-type at double-legged line electric cap input, can form pin-pin and the high-effect electrostatic leakage passage of pin-shell simultaneously, electrostatic defending electric cap still can keep the ignition quality of former common electric cap and export power.
For the operating voltage of the highest static electricity on human body's voltage pole end value 50kV, maximum surge current 500A and electric cap, determine maximum surge current bearing capacity in electrostatic defending PCB, protective device maximum surge current and clamping voltage (breakdown voltage) successively, then determine wire structures and the size of electrostatic defending PCB.
For small size electric cap pin-pin and pin-shell performance requirement of electrostatic defending electronic device and installation requirement, propose a kind of disc PCB scheme, have following function concurrently: fixing electrostatic defending electronic device is connected with payment to a porter circuit and is connected with shell circuit, provides electrostatic leakage the air gap between pin shell.The circuit structure of described PCB comprises three profiled metal pads, two metal discharge poles, two metallization via holes.
The front of PCB arranges three profiled metal pads, longer rectangular pads, a shorter rectangular pads and a circular arc pad; The first half of longer rectangular pads and shorter rectangular pads partner electrode, for connecting the two poles of the earth of a SMD two-way TVS pipe electrostatic defending electronic device of microminiaturization, electrostatic protection device and electric spark workpiece pin-human hair combing waste fire loop is made to form parallel circuit, form pin-pin electrostatic leakage passage; Lower Half and the circular arc pad of longer rectangular pads form another pair of electrodes, for connecting the two poles of the earth of the microminiaturized SMD two-way TVS pipe electrostatic defending electronic device of another, make electrostatic protection device and electric spark workpiece pin-shell get angry loop and form parallel circuit, form electrostatic leakage passage between pin-shell; The safeguard function in corresponding electrostatic firing loop is then only possessed, if when connecting two electrostatic protection devices, possess the safeguard function in electric spark workpiece pin-pin, pin-shell electrostatic firing loop simultaneously when only connecting an electrostatic protection device.
The reverse side of PCB arranges the zigzag discharge electrode of two symmetric shapes, for the protection of pin shell static discharge, and repeatedly electrostatic discharge protective can be realized, zigzag discharge electrode and electrostatic protection device acting in conjunction constitute the double insurance effect of pin-shell electrostatic defending.
High-effect electrostatic defending bridge-wire electric detonator is made up of a microminiaturized wafer-type TVS pipe electrostatic defending assembly and a common electric cap.Electrostatic defending component assembling at the capsule oral area of electric cap electrode plug one end, and forms circuit with payment to a porter, capsule and is connected, and forms pin-pin and the high-effect electrostatic leakage passage of pin-shell simultaneously.It is capsule, high explosive, priming, ignition medicine, double-legged line bridge silk electrode plug, wafer-type TVS pipe electrostatic defending assembly, oral area fluid sealant that electric cap inner body assembly structure closes.Wafer-type TVS pipe electrostatic defending assembly is fixed on capsule oral area by shell bottling technique, namely during electric cap component location guide chip TVS pipe electrostatic defending assembly, does not change the assemble sequence of former electric cap inner body.
The loading of high-effect electrostatic defending assembly does not affect the ignition quality such as firing voltage, firing current, action time of former electric cap, and described high-effect electrostatic defending electric cap still can keep the normal ignition quality of former common electric cap and export power constant.
By theory calculate and experimental verification, select suitable TVS pipe parameter, the pin-pin of high-effect electrostatic defending electric cap and pin-shell antistatic capacity can be made all to reach anti-extreme static electricity on human body more than 50kV.Its antistatic effect is much higher than the electric spark workpiece human body electrostatic ceiling voltage 25kV required in existing military standard GJB 5309.14-2004 " priming system test method the 14th part: ESD test ", MIL-DTL-23659F-2010 " electric initiator universal design specification ", and higher than the human body electrostatic ceiling voltage 10kV required in commercial electric detonator existing national standards GBT8031-2005 " commercial electric detonator ".Due to TVS pipe, to have antisurge impact capacity strong, and surge impact of can repeatedly releasing, is therefore assembled with the electric cap of suitable parameters TVS pipe, can realize pin-pin and the anti-50kV of pin-shell many static discharges and any performance change can not occur.
The invention has the beneficial effects as follows: the antistatic capacity of TVS pipe of the present invention high-effect antistatic bridge-wire electric detonator is much higher than the technical indicator that existing military standard and industrial standard require electric cap Electrostatic Safety, pin-pin and pin-shell antistatic capacity all can reach anti-extreme static electricity on human body more than 50kV, higher than 2 times of the human body electrostatic ceiling voltage 25kV that existing electric cap military standard requires, higher than 5 times of the human body electrostatic ceiling voltage 10kV that applicable industry electric cap national standard requires.No matter be protect at pin-shell or the repeat impact of 50kV static discharge can both be stood and any performance change can not occur in pin-foot protection.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is high-effect electrostatic defending assembly front
Fig. 2 is high-effect electrostatic defending assembly reverse side
Fig. 3 is that high-effect electrostatic defending assembly and electrode plug assemble schematic diagram.
Fig. 4 is that high-effect electrostatic defending assembly and electric cap assemble schematic diagram.
Fig. 5 is TVS pipe power and electrostatic power graph of a relation
Detailed description of the invention
Composition graphs 3, Fig. 4, the bridge-wire electric detonator of the antistatic environment of patent of the present invention comprises band XXX type TVS pipe 1, 5, disc electrostatic defending PCB, electrode plug 8, bridge silk, ignition medicine, priming, export medicine, shell 11, the zigzag copper-clad plate 6 of TVS pipe guard assembly will have been welded, 7 sides contact with the bottom (the other side of welded bridge silk) of electrode plug, by metallization via hole 2, 3 through payment to a porter 9, form circuit after 10 to connect, circuit connects employing Reflow Soldering, manual soldering or painting conducting resinl, skim air-gap can be formed because copper-clad plate exceeds pcb board become static discharge gap between copper-clad plate and housing 11, metallization via hole 2, 3 with payment to a porter 9, the good electrode plug assembly formed with TVS pipe electrostatic protection device of 10 welding, then electric cap is formed according to electric cap manufacture craft, capsule closing in back casing 11 and arc pad 4 is connected and realizes structure and is combined and connects with circuit.In pin-shell electrostatic defending, existing TVS pipe has again air-gap leakage path, protects in protection base-pin electrostatic by TVS pipe.No matter operating characteristic due to XXX type TVS pipe is protect at pin-shell or can both stand the repeat impact of static discharge and any performance change can not occur on pin-foot protection if determining.
For the needs of Bridgewire EED pin pin electrostatic discharge protective, following several respects content in the type selecting of TVS pipe, should be considered:
1. the positive and negative two kinds of senses of current of the injection of actual static discharge between pin pin all likely, therefore, selects two-way TVS, injects can play a protective role to the static discharge current of any direction.
2. the maximum reverse operating voltage V of TVS
rWM(under this voltage, the leakage current of TVS only has a few μ A) is greater than the normal working voltage of protected device, affects performance when preventing priming system from normally working due to TVS shunting.
3. the clamping voltage Vc of TVS is the highest spacing voltage of TVS pipe, and it is less than the static damage voltage of protected device, this makes it possible to effective protection device.
4. the peak power of TVS will be chosen in accordance with TVS pipe power and electrostatic power graph of a relation, otherwise may burn out TVS.
5. the response time is exactly the time that TVS pipe voltage reaches that operating voltage starts to playing a protective role, and it must be less than the time of static discharge.
The electrode plug size 3.45 × 3mm of sample, bridge silk is 10 μm of PtW alloys, product resistance 3 Ω ~ 9 Ω, ignition operating voltage 12V (6.8 μ F), and the energy acting on priming system when can calculate normal work is 4.9 × 10
-4j; The critical firing voltage 18.45kV of pin pin electrostatic, being loaded into maximum voltage on electric spark workpiece under electrostatic interaction can not more than 22V, and its peak power is 88.6W.
Protective device Selecting All Parameters foundation:
(1) according to product specification, sample normal working voltage is 12V (6.8 μ F), and nargin is crossed in reliability consideration, then the reliable firing voltage of this priming system is 12V;
(2) show that the critical firing voltage of sample electrostatic environment is 18.45kV according to the test of product electrostatic, the voltage that can be calculated the loading of priming system two ends is 22V, and security consideration nargin is 1.3, then the maximum voltage of misfiring of this priming system electrostatic is 15.5V;
(3) security reliability of the selection combination product of protective device determines the parameter choose of protective device, therefore chooses TVS pipe maximum reverse operating voltage V
rWMshould between 12V ~ 15.5V;
(4) TVS pipe clamping voltage is selected to be less than the maximum voltage of misfiring of priming system electrostatic is 15.5V;
(5) when can draw static discharge by old xerographic paper discharge current time waveform, the rise time is several nanosecond, and therefore the response time of protective device must be less than nanosecond (10
-9s);
(6) according to the mono-RC model of the electrostatic discharge environments 50kV of the limit (series connection 5k Ω), rated output is 598.56W, electrostatic discharge environments 50kV is no more than 1 μ s discharge time, then according to TVS pipe power and electrostatic power graph of a relation, therefore TVS pipe power is decided to be and is not less than 100W.
Therefore choose that TVS pipe maximum reverse operating voltage V should (margin of safety be 1.3 between 12V ~ 15.5V; If lower than 12V, then sample is by cisco unity malfunction, and higher than 15.5V, TVS pipe will not play protective action).This sample chooses P6KE12CA type and the two-way TVS pipe of ESD12V32D-C.
It should be noted that; the foregoing is only preferred embodiment of the present invention; not thereby limit scope of patent protection of the present invention, the present invention can also carry out the improvement of materials and structures to the structure of above-mentioned various parts, or adopts technically equivalent ones to replace.Therefore the equivalent structure change that all utilizations description of the present invention and diagramatic content are done, or directly or indirectly apply to other correlative technology fields and be all in like manner all contained in the scope that the present invention contains.
Claims (3)
1. the high-effect electrostatic defending bridge-wire electric detonator of TVS pipe type, comprise a common electric cap and a wafer-type TVS pipe electrostatic defending assembly, it is characterized in that the oral area of described electrostatic defending component assembling in electric cap electrode plug one end, form the electrostatic leakage passage of pin-pin and pin-shell electrostatic defending simultaneously.
2. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, it is characterized in that the assembly structure of electric cap inner body closes is capsule, high explosive, priming, ignition medicine, double-legged line bridge silk electrode plug, wafer-type TVS pipe electrostatic defending assembly, oral area fluid sealant, wafer-type TVS pipe electrostatic defending assembly is fixed on capsule oral area by shell bottling technique, namely assembles the assemble sequence that wafer-type TVS pipe electrostatic defending assembly does not change former electric cap inner body.
3. high-effect electrostatic defending bridge-wire electric detonator according to claim 1, is characterized in that the height of wafer-type TVS pipe electrostatic defending assembly only has 0.8mm ~ 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420692478.0U CN204461249U (en) | 2014-11-18 | 2014-11-18 | The high-effect electrostatic defending bridge-wire electric detonator of a kind of TVS pipe type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420692478.0U CN204461249U (en) | 2014-11-18 | 2014-11-18 | The high-effect electrostatic defending bridge-wire electric detonator of a kind of TVS pipe type |
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| CN204461249U true CN204461249U (en) | 2015-07-08 |
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| CN201420692478.0U Expired - Fee Related CN204461249U (en) | 2014-11-18 | 2014-11-18 | The high-effect electrostatic defending bridge-wire electric detonator of a kind of TVS pipe type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390531A (en) * | 2014-11-18 | 2015-03-04 | 北京理工大学 | TVS tube type high-efficiency static-protection igniter wire type electric detonator |
-
2014
- 2014-11-18 CN CN201420692478.0U patent/CN204461249U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104390531A (en) * | 2014-11-18 | 2015-03-04 | 北京理工大学 | TVS tube type high-efficiency static-protection igniter wire type electric detonator |
| CN104390531B (en) * | 2014-11-18 | 2017-11-03 | 北京理工大学 | A kind of high-effect electrostatic protection bridge-wire electric detonator of TVS pipe type |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20181118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |