CN2134636Y - Safety electrical detonator - Google Patents
Safety electrical detonator Download PDFInfo
- Publication number
- CN2134636Y CN2134636Y CN 92228760 CN92228760U CN2134636Y CN 2134636 Y CN2134636 Y CN 2134636Y CN 92228760 CN92228760 CN 92228760 CN 92228760 U CN92228760 U CN 92228760U CN 2134636 Y CN2134636 Y CN 2134636Y
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- detonator
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- glass tube
- conductive sheet
- coil
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Abstract
The utility model relates to a safety electrical detonator which overcomes the shortage that a common electric detonator is easy to detonate because of induction current, leakage current and stray current. On the basis of an original electric detonator, a group of ferromagnetic electric conduction metal sheets which can be magnetized under the action of the current of a coil and are arranged inside a glass tube are increased; under the condition of rated voltage, the ferromagnetic electric conduction metal sheets are caused to attract so as to cause heating wires inside the electric detonator to heat and detonate. The detonation voltage of the safety electrical detonator is higher than the detonation voltage of the common electric detonator by two to three orders of magnitude, so the safety of the electric detonator is enhanced.
Description
The utility model relates to a kind of detonator that is used for bursting work, particularly a kind of safe electric detonator that is used for bursting work with main firing.
At present, the common electrical detonator that bursting work is used mainly is made up of explosive, heating wire, lead usually.Its minimum electric ignition supply voltage that detonates is low, as now igniting an electric cap with 1 volt of power supply of low tension detonator, very easily reveals in the place that stray electrical current is big.The high-tension electricity detonator also only needs 6 volts of power supplys can ignite single detonator, though stray electrical current is had certain resistivity, in practicality, resistivity is still relatively poor, and is not too safe.These deficiencies of common electrical detonator are used it and are restricted in some complicated application scenarios, as in mine, operation and at detonator, transporting, deposit in the process, inevitably there is electrical equipment to exist, the equipment electric leakage is also just arranged, the generation of high frequency induction current and various stray electrical current situations, when above-mentioned factor exists, just might produce and misquote quick-friedly, cause major accident.
The purpose of this utility model is exactly to design a kind of safe electric detonator that higher ignition voltage is arranged, so that common leakage current, induced-current and stray electrical current do not play the ignition effect to this safe electric detonator, even with 250 volts of power supplys of direct current or 220～660 volts of two ends that AC power is directly received this safe electric detonator, it can not ignited yet, have only the special-purpose apparatus to cause bursting of use, safe electric detonator could be ignited reliably at short notice.So just improve the security reliability of electric cap, remedied the deficiency of common electrical detonator.
The utility model is achieved in that on the basis of common electrical detonator, has installed the ignition voltage-operated device additional.Its structure is: in the hole of garden, the glass tubular type protective tube two ends metal weld cap center heart, insert a ferromagnetic conductive sheet metal through anti-oxidant treatment respectively, its shape and structure are similar to two ferromagnetic conductive sheet metals in the interior tongue tube of dry-reed relay.The structure that also can directly replace glass tube, ferromagnetic conductive sheet metal and metal weld cap formation with tongue tube.Staggered 1～3mm is not connected for two ferromagnetic conductive sheet metal end parts parallel at the middle part in the glass tube, and leaving a width therebetween is the arcing gap of 0.02～0.5mm.This arcing gap width is difference with the difference of required safe voltage class.Be with a solenoid that is wound on the insulated coil skeleton on the glass tube outer wall, the number of turns is between 100～1000 circles, and line directly is 0.08～0.25mm.The ferromagnetic conductive sheet metal all welds with the metal weld cap and makes the ignition voltage-operated device.Then, one of coil is terminated on the ferromagnetic conductive sheet metal, and the other end of coil is connected with heater strip, and another ferromagnetic conductive sheet metal is from the external lead of metal weld cap, and together be packaged in the electric cap shell of lengthening with heater strip other end lead, promptly constituted safe electric detonator.
Below in conjunction with accompanying drawing the utility model is described in further details.
Fig. 1 is overall structure figure of the present utility model.
With reference to Fig. 1.Safe electric detonator is made up of shell (1), explosive (2), metal weld cap (3), (6), glass tube (4), ferromagnetic conductive sheet (5), (10), detonator lead-in wire (7), (8) coil (11), heater strip (13), insulated coil skeleton (12).Wherein: (3), (4), (5), (6), (10), (11), (12) are formed the ignition voltage-operated device again.Ignite the operating voltage of voltage-operated device, can be divided into several grades according to the difference of safe electric detonator application scenario; The occasion that is used for direct current 380V, the following supply voltage of alternating current 220V can adopt 450V class type.Be used for direct current 660V and exchange 380V following supply voltage occasion, can adopt 700V class type.Be used for the occasion of direct current 1150V and the following supply voltage of interchange 660V, can adopt 1200V class type.Be used for direct current 2500V, can adopt 2800V class type.The ignition DC voltage of its special-purpose trigger output is: the 450V class ignite voltage with 550V.700V class type ignite voltage with 800V.1200V class type ignite voltage with 1300V.2800V class type ignite voltage with 2900V.
Be example now, describe the ignition principle and the process of safe electric detonator in detail with the 450V class.When igniting, add 550V direct current ignition voltage at the two ends of safe electric detonator.Ferromagnetic conductive sheet metal (5), (10) two ends promptly are coupled with an arcing voltage, the breakdown generation electric arc of air in the arcing gap (9), flow through a little electric current in the coil (11), produce a more weak magnetic field, this magnetic field makes two ferromagnetic conductive sheet metals (5), (10) magnetization, and make its direction of magnetization identical, polarity is opposite in parallel staggered place, produce suction each other, arcing gap (9) is reduced, cause the arcing electric current bigger, the electric current that passes through in the coil (10) is bigger, magnetic force is stronger, and arcing gap (9) are littler, so circulation, finally making arcing gap (9) width is zero, two feeromagnetic metal conducting strips (5), (10) directly contact, the 550V DC voltage all is added in heating wire (13) two ends by coil (11), causes heating wire (13) heating ignition rapidly.Its process time is very short, approaches the detonation velocity of instant electric detonator.The course of work of other class is same as described above.
Can find out from the course of work of safe electric detonator: the factor that the decision safe electric detonator is ignited voltage, it is the width of igniting the feeromagnetic metal conducting strip arcing gap in the voltage-operated device, air humidity, air composition etc., what wherein play an important role is the width in arcing gap, have only when applied voltage and could puncture air in the arcing gap greater than detonator during required arcing voltage, produce the arcing electric current, promptly produce and quicken the cyclic process that the arcing electric current increases, final circuit is connected and is ignited.And when applied voltage was lower than arcing voltage, because of not producing electric arc, supply line's open circuit can not detonate.So,,, all can not detonate as long as its magnitude of voltage (comprising peak value, peak-to-peak value) is lower than arcing voltage no matter be alternating voltage, DC voltage, induced voltage, stray electrical current voltage.So the voltage ratio common electrical blasting cap initiation voltage that detonates of this safe electric detonator has improved two to three orders of magnitude.
The production of safe electric detonator, detection require: whole welding processes are only permitted to use neutral scaling powder in a, the production.Forbid to use mordant scaling powder.Otherwise, will have a strong impact on the accuracy of arcing and ignite reliability.When b, welding ferromagnetic conductive sheet metal, distinguish class, the strict width of grasping the arcing gap.C, the safe electric detonator of making must carry out protection against the tide to be handled, and it both can prevent the influence to the arcing magnitude of voltage of air humidity, air composition, can make the feeromagnetic metal sheet avoid getting rusty again and coil avoids mould disconnected.D, to the detection of safe electric detonator, mainly be to detect the arcing magnitude of voltage, just detect the width in arcing gap.Its detection can be chosen wantonly with direct voltage source, but voltage accuracy, stability must be high.Now the safe electric detonator with the 450V class is an example, and detection method and requirement are described.Before the ignition voltage-operated device is not packed shell into, directly the 400V DC voltage is added to the two ends of glass tube through the electric current ammeter, this moment, the electric current indicator should be motionless, represent that no arcing electric current produces, when DC voltage rises to 500V, ammeter pointer is deflection to some extent, and the arcing electric current of expression produces, these such certified products.If there is the arcing electric current to produce when applying 400V voltage, or all do not have the arcing electric current when adding 400V and 500V DC voltage and produce, such defective work that is must through being up to the standards, can use after the arcing gap width is proofreaied and correct in welding again.If can adopt the production technology and the material of tongue tube, the strict arcing gap width of grasping is when igniting the structure that voltage available tongue tube in the 100V-400V scope replaces above-mentioned glass tube, feeromagnetic metal conducting strip and metal weld cap to constitute.
Claims (1)
1, a kind of safe electric detonator is made up of shell (1), explosive (2), metal weld cap (3), (6) glass tube (4), ferromagnetic conductive sheet metal (5), (10), lead-in wire (7), (8), coil (11), insulated coil skeleton (12), heater strip (13), it is characterized in that:
A. in the common electrical detonator shell, install a glass tube (4) additional, a pair of ferromagnetic conductive sheet metal (5), (10) arranged in the glass tube (4),
B. the parallel interlaces lengths 1～3mm of ferromagnetic conductive sheet metal (5), (10), and do not link to each other mutually, there is the arcing gap (9) of a width in 0.02～0.5mm scope the centre,
C. metal weld cap (3), (6) are sealed in glass tube (4) two ends and are connected with ferromagnetic conductive sheet metal (5), (10) respectively,
D. coil (11) is wrapped in that insulated coil skeleton (12) is gone up, the insulated coil skeleton is enclosed within on the outer ring of glass tube (4), and the number of turn of coil (11) is between 100～1000 circles, and line directly is 0.08～0.25mm,
E. coil (11) one ends link to each other with metal weld cap (3), and the other end links to each other with heater strip (13) one ends,
F. lead-in wire (7) links to each other with metal weld cap (6), and lead-in wire (8) links to each other with heater strip (13) other end,
G. similar because of the structure of glass tube (4), ferromagnetic conductive sheet metal (5), (10) and metal weld cap (6) composition to existing tongue tube, so available tongue tube replaces the structure that glass tube (4), ferromagnetic conductive sheet metal (5), (10) and metal weld cap (6) constitute in 100V-400V ignites voltage range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92228760 CN2134636Y (en) | 1992-07-31 | 1992-07-31 | Safety electrical detonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92228760 CN2134636Y (en) | 1992-07-31 | 1992-07-31 | Safety electrical detonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2134636Y true CN2134636Y (en) | 1993-05-26 |
Family
ID=33772329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92228760 Expired - Fee Related CN2134636Y (en) | 1992-07-31 | 1992-07-31 | Safety electrical detonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2134636Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440976A (en) * | 2016-10-20 | 2017-02-22 | 南京理工大学 | Electrical firing bullet primer with metal fuse |
| CN106643357A (en) * | 2017-02-22 | 2017-05-10 | 西南科技大学 | Sympathetic detonation system |
-
1992
- 1992-07-31 CN CN 92228760 patent/CN2134636Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106440976A (en) * | 2016-10-20 | 2017-02-22 | 南京理工大学 | Electrical firing bullet primer with metal fuse |
| CN106440976B (en) * | 2016-10-20 | 2018-03-09 | 南京理工大学 | A kind of Electric-percussion bullet fire in a stove before fuel is added with metal fuse |
| CN106643357A (en) * | 2017-02-22 | 2017-05-10 | 西南科技大学 | Sympathetic detonation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |