CN1047383A - Anti-static and anti-impurity industrial electric detonator - Google Patents

Abstract

The invention relates to an industrial electric detonator which can resist static electricity and stray current. The present invention features that a cylindrical ferrite core converter is added between the ignition bridge wire and the leading-out leg wire of conventional industrial detonator. The electric detonator added with the converter can eliminate the danger of accidental explosion caused by non-detonating electric energy such as static electricity, stray current and the like entering the electric detonator, and the converter is particularly simple to process and easy to realize industrial production. The magnetic core material is manganese-zinc or nickel-zinc soft magnetic ferrite and is in a double-hole column shape or a single-hole column shape. The new detonator with the converter added can be detonated by high frequency current such as (15KHz) and can be checked by a meter.

Description

Industrial electric detonator resisting static electricity and interference

The present invention a kind ofly can fundamentally eliminate dc stray current, the commercial electric detonator of poor alternative stray current of worker and electrostatic hazard, the F-42C class that belongs to International Patent Classification (IPC), can be used among the various blasting engineerings of departments such as coloured, metallurgical mine, water conservancy, railway, oil field, coal, to improve the security of blasting work.

Electric cap is a kind of easy to use, the reliability height, and use properly, therefore the initiating equipment that security is also quite high at home and abroad is used widely.But the common electrical detonator does not sort the function that receives extraneous electric energy, which kind of electric energy no matter, if a payment to a porter of drawing that enters electric cap, just may be with cap sensitive.In the actual blasting engineering, various electric energy activities are very frequent again, comprise consumer electric leakage, induced-current, radio frequency electricity, environmental accumulation static, static electricity on human body or the like.So electric cap is caused the case of serious accident quite a lot of by unintended detonation.In order to address this problem, rule to the activity of blast working field electric energy compares deep research, discovery can cause the various electric energy of electric cap unintended detonation, be characterized in frequently lower, frequency as frequency stray current is zero He Zhi, static (during discharge) concentration of energy is in low frequency part, so proposed 8710 No. 3475 inventions of CN (open day: on November 30th, 1988).In this invention, using an external diameter is the ferrite bead of 5-7 millimeter, former and deputy limit is drawn payment to a porter respectively and is got angry the bridge silk behind the kinking, add in the electric cap, thereby static and AC and DC stray electrical current, faradic harm have fundamentally been got rid of, because the converter made from soft magnetic ferrite is nullvalent substantially to frequency less than the low-frequency current of 1000 He Zhi.

But, when making converter with small magnet, since small-sized, so the kinking number of turn of former secondary all wants many, obtain enough igniting towards energy to ensure ignition bridge silk.As with being of a size of external diameter X internal diameter X thickness=5 * 2.5 * 1.5(millimeter) little ring the time, the former secondary turn ratio was up to 6: 8.At present, kinking is mainly finished by craft, twines many like this numbers of turn on so little magnet ring, and efficient is very low, is unfavorable for suitability for industrialized production, and the diameter of used line is very little, is unfavorable for welded bridge silk and external payment to a porter.In order to address this problem, we have proposed the present invention.

The invention is characterized in the toroidal core that replaces former usefulness with a magnetic ferrite magnetic core that is shaped as cylindricality.Because the compact conformation of cylindricality magnetic core, magnetic circuit is reasonable, so improved stock utilization greatly, has reduced the kinking number of turn exponentially, and in the present invention, the turn ratio on former and deputy limit is generally all used 1: 1.Used cylindricality magnetic core has two kinds of citation forms, and the one, the biporate column shape (see figure 3), another is the monoporate column shape (see figure 4).When using the biporate column shape magnetic core, only need to curve "

" plastic insulated wire or the enamel-covered wire of font insert in two holes respectively from top to bottom or from lower to upper, promptly finishes the making of a converter.When using monoporate column shape, only need two plastic insulated wires that color is different or enamel-covered wire to insert simultaneously in the centre bore, then the two ends of same colo(u)r streak are held together respectively to the upper surface and the lower surface of cylindricality magnetic core and twisted fried dough twist, promptly finish the making of a converter.The external diameter of cylindricality magnetic core is suitable with the housing diameter of electric cap.The housing diameter of general industry detonator is (except the extraordinary detonator) between the 6-20 millimeter, the desirable 5-15 millimeter of the external diameter of cylindricality magnetic core, and for extraordinary detonator, external diameter is also changeable, the design according to the invention of its reason.The height of cylindricality magnetic core should adapt with the length of electric cap, and like this, the common electrical detonator just can not change appearance and size and manufacturing process substantially, becomes new detonator later at adding converter of the present invention.For common commercial electric detonator, the height of cylindricality magnetic core generally should be less than 4 millimeters, to ensure that converter has stronger sensing capability.When the height of cylindricality magnetic core is big, help improving the sensing capability of converter.For the general industry electric cap, the height value of cylindricality magnetic core and is used for extraordinary detonator between the 4-15 millimeter, and this height value also can be obtained greater or lesser.

The material of magnetic core is best with the Mn-Zn soft magnetic ferrite, and Ni-Zn soft magnetic ferrite takes second place.The initial permeability of manganese-zinc ferrite generally should be more than 2000, and the saturation induction powerhouse is good with high person also, generally is not lower than 3000 Gausses, and when the environment for use temperature when higher, also require the Curie temperature of material to be higher than the temperature of environment for use.Other performance indications for soft magnetic ferrite do not have specific (special) requirements.

The profile of biporate column shape can be garden cylindricality or approximate ellipse garden cylindricality, and the latter more saves material than the former.When the sensing capability of a cylindricality magnetic core is not enough, can be with the number of turn on former and deputy limit by changing the multiturn kinking at 1: 1, perhaps to use several cylindricality magnetic cores are folded mutually, its effect is the same with the height of increase magnetic core.Two monoporate column shape magnetic cores can and be made a biporate column shape magnetic core and are used, and its effect equates with the biporate column shape of suitable size.

Cylindricality magnetic core converter can with the plastic plug cast solid of electric cap, be contained in electric cap inside, also can directly partly or entirely replace plastic plug and the electric cap of packing into, as Fig. 1 with cylindricality magnetic core converter.In general, shell wants toothed oak to prolong accordingly when being contained in cylindricality magnetic core converter in the shell, and the plastic plug Shooting Technique also slightly changes.For not influencing original production process, also cylindricality magnetic core converter can be contained in the electric cap mouth of pipe, as Fig. 2.When converter is contained in the mouth of pipe, should consider converter is taked the certain intensity safeguard measure, as add plastics or latex overcoat.Cylindricality magnetic core converter is added in the electric cap inside or the mouth of pipe, which kind of electric cap all to be feasible scheme to.Converter combines with the commercial electric detonator of various uses, all can make these electric caps have performance antistatic, anti-stray current, and not change original all characteristics (as sending out characteristic wink, ms postpone, half second delay or second delay firing characteristic, heatproof characteristic, anti-gas characteristic or the like).Fig. 1 represents that biporate column shape magnetic core converter combines with millisecond delay electric detonator, form resisting static electricity and interference ms postpone commercial electric detonator of the present invention, this detonator can be used for gallery, courtyard, the shaft sinking in mine, the mining blasting of sub-terrain mines in the open,, and tunnel piercing, in the various blasting engineerings in urban demolition blasting or the like.Fig. 2 represents that biporate column shape magnetic core converter combines the high temperature resistant commercial electric detonator of formation resisting static electricity and interference of the present invention with high temperature resistant electric cap.[3] adopt phenolic resin, [6] to adopt crystallization lead azide (Pb06) in figure, and when [8] adopted the hexogen high explosive, this detonator can anti-180 ℃ of high temperature.Require the Curie temperature of cylindricality magnetic core to be not less than 180 ℃ this moment.So, the detonator of Fig. 2 (sometimes cylindricality magnetic core converter being contained in shell inside) can be used for the explosion of oil deep-well perforation.Cylindricality magnetic core converter combines with the electric cap of other various performances, makes the new features with resisting static electricity and interference, is identical with the technical conceive of aforesaid two kinds of detonators, and this specification is not enumerated one by one.

Why detonator of the present invention has fundamentally solved electric cap to electric safety problem, even be because the maximum that various stray electrical currents and static may occur directly is added on the loading wire of electric detonator, also electric cap can not ignited.As 220 volts, 380 volts voltages (supply voltage of industrial stray electrical current) are directly fed electric cap, do not ignite electric cap; The direct current of intensity up to 100 amperes directly fed electric cap do not ignite electric cap; Up to 2100 volts, the capacitive blaster of capacitance 400 microfarads is directly to loading wire of electric detonator discharge, not detonating primer with charging voltage value.These data show, detonator of the present invention to electric security, be higher than existing various electrical or non-electrical industrial detonators, as plastic detonating tube on-electric detonator general industry electric cap, anti-strays detonator (low resistance formula, electric detonator with electricity conductive charge) or the like.When in all kinds of blasting engineerings, using detonator of the present invention, can uninterrupted operation.

Detonator of the present invention does not change existing material with the commercial electric detonator shell, promptly uses metal shell (metals such as copper, aluminium, iron), paper shell, plastic casing all can.

Detonating of the blasting network of detonator of the present invention and composition thereof needs the special electric power initiator that provides powerful high frequency electric with.The frequency of initiation current is about 15 kilo hertzs of sesames, and the initiation current intensity of single-shot detonator (referring to primary current intensity) is looked electric cap susceptibility different initiation current strength and differed greatly about 1 ampere.About special-purpose initiator, can consult No. 87103065 applications for a patent for invention of CN of Chinese patent application number.Detonator of the present invention can also be checked (electric firing part) quality situation with instrument, and the scope of examination comprises: the resistance of converter secondary loop promptly comprises and gets angry the loop resistance of bridge silk; Whether the converter magnetic core has abnormal quality; Draw the payment to a porter line and whether have break point.About the dedicated test instrument, can consult the CN 8710 of Chinese patent application number No. 87206851 utility application of No. 64 applications for a patent for invention and CN.

When implementing in the following manner, detonator of the present invention can obtain good effect:

1. garden cylindricality diplopore magnetic core, 6 millimeters of external diameters, 6 millimeters of height, the diplopore diameter is 1 millimeter, and diplopore centre-to-centre spacing is 3 millimeters, and center, every hole and frontier distance are 1.5 millimeters;

2. the material of garden cylindricality diplopore magnetic core is a Mn-Zn soft magnetic ferrite, and the preliminary examination magnetic conductivity is μ i=2000, saturation induction density Bs=4700(Gauss), Curie temperature Tc=210 ℃;

3. make converter with this magnetic core, the former secondary turn ratio is 1: 1, and secondary connects electric cap ignition bridge silk, and former edge joint is gone into high frequency (15KHz) initiator;

4. the minimum firing current of used electric cap is 200 milliamperes, adds after the converter, with high-frequency initiation device energy reliable initiation;

5. with the identical monoporate column shape magnetic core of material, be of a size of 4 millimeters of external diameters, 1 millimeter of internal diameter, 6 millimeters of height, the turn ratio was also got 1: 1, and the minimum firing current of institute's test detonator also is 200 milliamperes, program by above-mentioned test biporate column shape magnetic core converter is tested, and also can obtain the effect of detonating reliably.

Claims (7)

1, a kind ofly can resist the harm of static and stray electrical current, especially can resist power current (50/60 He Zhi) and direct current, and the commercial electric detonator of the on-the-spot accumulation of blast working electrostatic hazard, by drawing payment to a porter [1], converter [2], plastic plug [3], ignition bridge silk (or point of amorce) [4], arming delay device [5], priming [6], high explosive [7], shell [8] is formed, it is characterized in that the ignition bridge silk of detonator and draw between the payment to a porter, be added with a cylindricality soft magnetic ferrite converter, drawing payment to a porter is the former limit of converter, and the loop that comprises ignition bridge silk is the secondary of converter.

2, the commercial electric detonator that meets claim 1, the material of converter magnetic core are MnZn or Ni-Zn soft magnetic ferrite, and the shape of converter magnetic core is biporate column shape or monoporate column shape.Converter magnetic core external diameter is the 5-15 millimeter.

3, the commercial electric detonator that meets claim 1, converter are added in electric cap inside, form one with plastic plug, or are added in the electric cap mouth.

4, the commercial electric detonator that meets claim 1 has the shell of metal or plastics or paper.

5, the commercial electric detonator that meets claim 1, its charge segment are ms postpone or second (half second) extension industrial detonator.

6, the commercial electric detonator that meets claim 1, its charge segment are high temperature resistant detonator.

7, the commercial electric detonator that meets claim 1, its charge segment are explosion-proof detonator.