CN103018312A - Explosive detonation property testing system under pulse high voltage and tested explosive loading part - Google Patents
Explosive detonation property testing system under pulse high voltage and tested explosive loading part Download PDFInfo
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- CN103018312A CN103018312A CN2012105636743A CN201210563674A CN103018312A CN 103018312 A CN103018312 A CN 103018312A CN 2012105636743 A CN2012105636743 A CN 2012105636743A CN 201210563674 A CN201210563674 A CN 201210563674A CN 103018312 A CN103018312 A CN 103018312A
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Abstract
The invention relates to an explosive detonation property testing system under a pulse high voltage and a tested explosive loading part. The microseond-stage pulse high voltage of the required pulse width is generated by a capacitive energy storage and charging unit and a pulse width control unit, and applied to the tested explosive loading part; then, a tested explosive is ignited by an ignition and explosion propagation unit in time sequence; and finally the high voltage resistance, the time sequence ignition stability, the detonation output property and the like of the tested explosive are measured by utilizing a detonating velocity and detonation voltage testing unit and a high voltage resistant testing unit under the microseond-stage pulse high voltage condition of the required pulse width. The explosive detonation property testing system and the tested explosive loading part are applicable to the explosive detonation property testing under the pulse high voltage, and have the characteristics of low cost, simple structure, adjustable pulse width and the like.
Description
Technical field
The invention belongs to Pulse Power Techniques and explosive detonation characteristic field tests, be specifically related to explosive detonation characteristic test macro and tested explosive loading parts under a kind of pulse high-voltage, is the device that can produce the Microsecond grade pulse high-voltage.
Background technology
In the Pulse Power Techniques field, firing pulse power technology aspect particularly, often need to use high explosive, and make under its effect that is in pulse high-voltage, require this explosive before normal operation, can not detonate because of the pulse high-voltage false triggering, and detonation process and the parameters such as explosion velocity and detonation pressure are not subjected to the impact of pulse high-voltage yet.Typically use object to be explosive magnetic compression generator, high voltage explosion switch etc.
Explosive magnetic compression generator (MFCG) is a kind of pulse current multiplying arrangement according to the design of magnetic field freezing effect.It utilizes the chemical energy of explosive to drive the formed loops such as solenoid, armature to be out of shape rapidly, and compression magnetic field work done makes simultaneously that loop inductance reduces, electric current increases, and the chemical energy of explosive is converted into the electromagnetic energy in the load the most at last.Thereby the power supply etc. that explosive magnetic compression generator can be used as the power supply of electromagnetic launcher, plasma focusing, high power electromagnetic radiation, laser instrument, generation high-intensity magnetic field and produces the high current charged particle beam as the excitation diode.In addition, because its single uses, mainly be in the high energy ELECTROMAGNETIC WEAPON, to be used as high-power pulse source.Wherein the quality of explosive detonation property under pulse high-voltage will directly affect the output performance of MFCG, so correlated performance detects most important.
And aspect the explosive detonation characteristic test, the explosion velocity of explosive and detonation pressure are the most important parameters that determines explosive detonation characteristic, and the relevant test method comparative maturity also is widely used at present.Explosion velocity is measured and is usually adopted the electrical resistivity survey skill of handling needles, and manganin piezoresistive method is adopted in the measurement of detonation pressure usually.
At present, still method and the device for explosive detonation characteristic test under the pulse high-voltage do not published, and the DC break down voltage equipment such as the main dependence of high voltage capability commonly used test voltage resistant instrument are finished, but because relevant device produces high-tension pulse width and is difficult to fine adjustment, and be difficult for mutually coupling use with the explosive detonation characteristic method of testing, therefore the difficulty of test that is applied to firing pulse power technology aspect is larger, precision is not high, can't satisfy the requirement of under the pulse high-voltage condition explosive detonation characteristic being tested.
Summary of the invention
The technical matters that solves
For fear of the deficiencies in the prior art part, the present invention proposes explosive detonation characteristic test macro and tested explosive loading parts under a kind of pulse high-voltage, solves a difficult problem that exists in the above-mentioned prior art.
Technical scheme
A kind of tested explosive loading parts is characterized in that comprising that primacord fuse connecting hole 1, Hi-pot test flat board 2, high-field electrode 3, epoxy resin 4, first trigger probe 5, second and triggers probe 6, the 3rd triggering probe 7, nylon outer shell 8, lucite spacer 9, teflon limit lid 12, teflon shell 13, low-field electrode 14, low voltage experiment flat board 15, manganese-copper piezoresistance sensor 18 and plexiglass base plate 11; Axis at teflon shell 13 is provided with a rectangular through-hole, and rectangular through-hole is divided into two sections; Wherein be respectively equipped with Hi-pot test dull and stereotyped 2 and low voltage experiment flat board 15 on one section two relative plane, end face is provided with teflon limit lid 12, and the center of teflon limit lid 12 is provided with primacord fuse connecting hole 1; Another section is provided with three grooves that spacing equates, end face is provided with manganese-copper piezoresistance sensor 18 and plexiglass base plate 11; The outside of teflon shell 13 is epoxy resin 4, and the outside of epoxy resin 4 is nylon outer shell 8; High-field electrode 3 is connected on the Hi-pot test flat board 2, and its lead-in wire passes epoxy resin 4 to nylon outer shell 8, and low-field electrode 14 is connected on the low voltage experiment flat board 15, and its lead-in wire passes epoxy resin 4 to nylon outer shell 8; First triggers probe 5, the second triggering probe 6 and the 3rd triggering probe 7 is placed in the rectangular through-hole by three grooves successively by the center, and inserts on the explosive tested in the rectangular through-hole, and the lead-in wire of three triggering probes passes epoxy resin 4 to nylon outer shell 8.
Explosive detonation characteristic test macro under a kind of pulse high-voltage that adopts described tested explosive loading parts is characterized in that comprising capacitance energy storage and charhing unit, blast synchro switch, initiator, detonator, the first primacord fuse, blast shunt, the second primacord fuse, the tested explosive loading parts of the 3rd primacord fuse, pulse forming network, pulsed constant current supply and the first oscillograph; The test macro annexation is: initiator, detonator and the first primacord fuse are sequentially connected, and the output of the first primacord fuse connects the blast shunt, output parallel join the second primacord fuse and the 3rd primacord fuse of blast shunt; The so-called output control of the second primacord fuse blast synchro switch, the high-field electrode of blast synchro switch input end connects the high-voltage output end of capacitance energy storage and charhing unit, and the high-field electrode of blast synchro switch output terminal connects the high-field electrode 3 of tested explosive loading parts; The output terminal of the 3rd primacord fuse is by the tested explosive of primacord fuse connecting hole 1 control of tested explosive loading parts, low-field electrode 14 ground connection of tested explosive loading parts, first triggers probe 5 and is connected the output terminal connection pulse forming network that triggers probe 6, and the output of pulse forming network connects the first oscillograph; The 3rd triggering probe 7 gating pulse constant current sources of tested explosive loading parts provide constant current signal for the manganese-copper piezoresistance sensor 15 of tested explosive loading parts, and the signal output part of manganese-copper piezoresistance sensor 15 connects the first oscillograph.
The input end of blast synchro switch also connects the second oscillograph by resitstance voltage divider.
Described capacitance energy storage and charhing unit comprise energy-storage capacitor, power supply, HVDC converter, the first current-limiting resistance and current-limiting resistance and the second current-limiting resistance; Power supply, HVDC converter, the first current-limiting resistance and energy-storage capacitor are sequentially connected and ground connection forms tank circuit, and energy-storage capacitor connects the high voltage input terminal of blast synchro switch by the second current-limiting resistance.
Described blast synchro switch comprises primacord fuse connecting hole 19, the first switch electrode 20, the first nylon sleeve 21, the second nylon sleeve 22, nylon limit lid 23, copper pipe 24, second switch electrode 25 and main blasting charge 26; The first nylon sleeve 21 and the second nylon sleeve 22 are mutually inlayed and are consisted of a cylinder, the second nylon sleeve 22 is groove structure, the first nylon sleeve 21 is provided with nylon limit lid 23, the primacord fuse connecting hole 19 that the center of nylon limit lid 23 is provided with, the center of cylinder is provided with main blasting charge 26, and wherein an end is connected with primacord fuse connecting hole 19; The outside of main blasting charge 26 is provided with copper pipe 24, the first switch electrode 20 passes the first nylon sleeve 21 and is connected with copper pipe 24, second switch electrode 25 is located at the outer ring of copper pipe 24 for ring-type, the lead-in wire that is provided with 21, two switch electrodes of the first nylon sleeve of insulation between second switch electrode 25 and the copper pipe 24 is worn to the first nylon sleeve 21; Described the first switch electrode 20 is the high-field electrode of input end, and described second switch electrode 25 is the high-field electrode of output terminal.
Described the second primacord fuse and the 3rd primacord fuse are carried on the tested explosive and form high voltage pulse, and the high voltage pulse width depends on primacord fuse explosion velocity v, the second primacord fuse length l
1With the 3rd primacord fuse length l
2, satisfy relational expression t=l
2-l
1/ v, wherein t is the high voltage pulse width that is carried on the tested explosive.
Main working process of the present invention is as follows: at first, utilize capacitance energy storage and charhing unit control energy-storage capacitor to be charged to the given voltage value; Then utilize the pulse width control unit that the high voltage of energy-storage capacitor is loaded on the tested explosive loading parts, and accurate gating pulse width; And then utilize the propagation of explosion unit sequential of the detonating tested explosive that detonates; Utilize at last explosion velocity detonation pressure test cell and high pressure resistant test cell to test the performance index such as withstand voltage, the explosion velocity of tested explosive, detonation pressure.High voltage performance, the sequential that can draw tested explosive by above-mentioned test result detonate stability and detonation output performance etc.
Beneficial effect
Explosive detonation characteristic test macro and tested explosive loading parts under a kind of pulse high-voltage that the present invention proposes, Microsecond grade pulse high-voltage by capacitance energy storage and charhing unit and pulse width control unit realization required pulse width produces, and it is carried on the tested explosive loading parts, then by the propagation of explosion unit sequential of the detonating tested explosive that detonates, finally utilize explosion velocity detonation pressure test cell and high pressure resistant test cell to measure the high voltage performance of tested explosive under the Microsecond grade pulse high-voltage condition of required pulse width, sequential detonate stability and detonation output performance etc.
The present invention is that a cover Microsecond grade pulse high-voltage produces system, and ingenious combination explosive detonation characteristic method of testing commonly used, and explosive detonation characteristic proving installation under the cover Microsecond grade pulse high-voltage that use in suitable firing pulse power technology field is provided.Dielectric voltage withstand performance, the sequential that this device can be measured tested powder charge under the Microsecond grade pulse high-voltage condition detonate stability and detonation output performance.And have the characteristics such as cost is low, simple in structure, pulse width is adjustable, suitable Exploding test application, can satisfy the requirement of firing pulse power technology high pressure resistant and relevant detonation property test to explosive fully.
The present invention is fit to be applied to explosive detonation characteristic test under the pulse high-voltage, and has the characteristics such as cost is low, simple in structure, pulse width is adjustable.Compared with prior art, the invention has the beneficial effects as follows: 1 can be used for detecting the dielectric voltage withstand performance of tested explosive under the Microsecond grade pulse high-voltage condition; 2 sequential that can be used for detecting tested explosive under the Microsecond grade pulse high-voltage condition stability that detonates; 3 can be used for detecting the detonation output performance of tested explosive under the Microsecond grade pulse high-voltage condition.
Description of drawings
Fig. 1: explosive detonation characteristic proving installation fundamental block diagram under the pulse high-voltage of the present invention;
Fig. 2: the detailed composition frame chart of explosive detonation characteristic proving installation under the pulse high-voltage of the present invention;
Fig. 3: tested explosive loading modular construction figure of the present invention;
The 1-the three primacord fuse connecting hole; 2-Hi-pot test is dull and stereotyped; 3-high-field electrode; 4-epoxy resin; 5-the first triggers probe; 6-the second triggers probe; 7-the three triggers probe; 8-nylon outer shell; 9-lucite spacer; 10-sensor connects oscillographic lead-in wire; 11-plexiglass base plate; 12-teflon limit lid; 13-teflon shell; 14-low-field electrode and lead-in wire; 15-low voltage experiment is dull and stereotyped; 16-tested explosive; 17-sensor connects the lead-in wire of pulsed constant current supply; 18-manganese-copper piezoresistance sensor;
Fig. 4: the blast diversion structure figure of the embodiment of the invention;
Fig. 5: the blast synchro switch structural drawing of the embodiment of the invention;
The 19-the second primacord fuse connecting hole; The 20-the first switch electrode; The 21-the first nylon sleeve; The 22-the second nylon sleeve; 23-nylon limit lid; 24-copper pipe; 25-second switch electrode; 26-main blasting charge.
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
Figure 2 shows that the composition frame chart of the embodiment of the invention, comprise capacitance energy storage and charhing unit, blast synchro switch, initiator, detonator, the first primacord fuse, blast shunt, the second primacord fuse, the tested explosive loading parts of the 3rd primacord fuse, pulse forming network, pulsed constant current supply and the first oscillograph; Utilize power supply, HVDC converter, current-limiting resistance etc. to realize the charging of energy-storage capacitor is controlled; The high voltage pulse width that utilizes the tested explosive initiation of realizations such as initiator, detonator, primacord fuse, blast shunt, blast synchro switch and be carried on the tested Explosive Parts is controlled; Utilize the realizations such as resitstance voltage divider, manganese-copper piezoresistance sensor, pulsed constant current supply, triggering probe, pulse forming network, oscillograph to the detonate test of stability and detonation output parameter of dielectric voltage withstand performance, the sequential of tested Explosive Parts.
Capacitance energy storage wherein and charhing unit comprise energy-storage capacitor, power supply, HVDC converter, the first current-limiting resistance and current-limiting resistance 2 and the second current-limiting resistance; Power supply, HVDC converter, the first current-limiting resistance and energy-storage capacitor are sequentially connected and ground connection forms tank circuit, and energy-storage capacitor connects the high voltage input terminal of blast synchro switch by the second current-limiting resistance.This unit is mainly used in realizing producing high voltage more than the 40kV at energy-storage capacitor.Its main process is: at first provide lower initial voltage by power supply, through producing the high voltage more than the 40kV behind the HVDC converter, and power to energy-storage capacitor by the 1st current-limiting resistance, thereby the voltage on the energy-storage capacitor is charged to more than the 40kV, finally by the 2nd current-limiting resistance high voltage is carried on the blast synchro switch.
Tested explosive loading parts wherein is characterized in that comprising that primacord fuse connecting hole 1, Hi-pot test flat board 2, high-field electrode 3, epoxy resin 4, first trigger probe 5, second and triggers probe 6, the 3rd triggering probe 7, nylon outer shell 8, lucite spacer 9, teflon limit lid 12, teflon shell 13, low-field electrode 14, low voltage experiment flat board 15, manganese-copper piezoresistance sensor 18 and plexiglass base plate 11; Axis at teflon shell 13 is provided with a rectangular through-hole, and rectangular through-hole is divided into two sections; Wherein be respectively equipped with Hi-pot test dull and stereotyped 2 and low voltage experiment flat board 15 on one section two relative plane, end face is provided with teflon limit lid 12, and the center of teflon limit lid 12 is provided with primacord fuse connecting hole 1; Another section is provided with three grooves that spacing equates, end face is provided with manganese-copper piezoresistance sensor 18 and plexiglass base plate 11; The outside of teflon shell 13 is epoxy resin 4, and the outside of epoxy resin 4 is nylon outer shell 8; High-field electrode 3 is connected on the Hi-pot test flat board 2, and its lead-in wire passes epoxy resin 4 to nylon outer shell 8, and low-field electrode 14 is connected on the low voltage experiment flat board 15, and its lead-in wire passes epoxy resin 4 to nylon outer shell 8; First triggers probe 5, the second triggering probe 6 and the 3rd triggering probe 7 is placed in the rectangular through-hole by three grooves successively by the center, and inserts on the explosive tested in the rectangular through-hole, and the lead-in wire of three triggering probes passes epoxy resin 4 to nylon outer shell 8.
These parts are mainly used in realizing the measurements such as the detonation rate, detonation pressure of tested explosive under the pulse high-voltage, and then the sequential that draws tested powder charge parts under the Microsecond grade pulse high-voltage condition detonate stability and detonation output performance.Pulse high-voltage is carried on the tested explosive, and guarantees pulse high-voltage and exterior insulation.Pulse high-voltage is loaded into tested explosive upper and lower end face by high-field electrode, low-field electrode, Hi-pot test is dull and stereotyped, low voltage experiment is dull and stereotyped etc., the tested explosive outside adopts teflon shell, epoxy resin and nylon outer shell etc. to realize insulation-encapsulated, to satisfy the external high pressure insulating requirements.Be illustrated in figure 3 as the tested explosive loading modular construction figure of our design.Its high-low pressure electrode and test slab adopt screw connection metal slab construction, and the lucite spacer structure is adopted in the rear end of tested Explosive Parts, are convenient to export detonation pressure and measure.
The synchro switch that wherein explodes comprises primacord fuse connecting hole 19, the first switch electrode 20, the first nylon sleeve 21, the second nylon sleeve 22, nylon limit lid 23, copper pipe 24, second switch electrode 25 and main blasting charge 26; The first nylon sleeve 21 and the second nylon sleeve 22 are mutually inlayed and are consisted of a cylinder, the second nylon sleeve 22 is groove structure, the first nylon sleeve 21 is provided with nylon limit lid 23, the primacord fuse connecting hole 19 that the center of nylon limit lid 23 is provided with, the center of cylinder is provided with main blasting charge 26, and wherein an end is connected with primacord fuse connecting hole 19; The outside of main blasting charge 26 is provided with copper pipe 24, the first switch electrode 20 passes the first nylon sleeve 21 and is connected with copper pipe 24, second switch electrode 25 is located at the outer ring of copper pipe 24 for ring-type, the lead-in wire that is provided with 21, two switch electrodes of the first nylon sleeve of insulation between second switch electrode 25 and the copper pipe 24 is worn to the first nylon sleeve 21; Described the first switch electrode 20 is the high-field electrode of input end, and described second switch electrode 25 is the high-field electrode of output terminal.
The blast synchro switch can be realized utilizing under high voltage condition primacord fuse to transmit detonation wave and drive its connection, and the conducting required time can accurately be controlled.Be illustrated in figure 5 as blast synchro switch structural drawing.Adopt the second primacord fuse to realize that main blasting charge detonates, adopt the first switch electrode to connect outside tested Explosive Parts, adopt the second switch electrode to connect outside current-limiting resistance and capacitor energy, nylon sleeve and nylon limit lid are mainly used in High-Voltage Insulation, copper pipe connects the first switch electrode, be mainly used under main blasting charge drives, smashing the nylon insulation course, make the first and second switch electrodes and conducting.Its main working process is: the detonation wave of the second primacord fuse transmission drives main blasting charge and detonates, and then drives the copper pipe expansion, smashes the nylon insulation course between copper pipe and the switch electrode, thereby realizes the conducting of the first and second switch electrodes.
The shunt that wherein explodes can be realized the input of the detonation wave of single channel primacord fuse, and the detonation wave of two-way or multichannel primacord fuse is exported simultaneously.Be illustrated in figure 4 as the structural drawing of blast shunt, its main part adopts steel or iron structure, guarantees the normal delivery of detonation wave in the primacord fuse so that enough intensity to be provided.Simultaneously open threaded hole in three directions, can connect teflon sleeve, to make things convenient for the access of primacord fuse.Wherein the perforate of upper surface is mainly used in connecting single channel and inputs the first primacord fuse, and the perforate of left and right sides end face is mainly used in connecting doubleway output second and the 3rd primacord fuse.
The annexation of native system is: initiator, detonator and the first primacord fuse are sequentially connected, and the output of the first primacord fuse connects the blast shunt, output parallel join the second primacord fuse and the 3rd primacord fuse of blast shunt; The so-called output control of the second primacord fuse blast synchro switch, the high-field electrode of blast synchro switch input end connects the high-voltage output end of capacitance energy storage and charhing unit, and the high-field electrode of blast synchro switch output terminal connects the high-field electrode 3 of tested explosive loading parts; The output terminal of the 3rd primacord fuse is by the tested explosive of primacord fuse connecting hole 1 control of tested explosive loading parts, low-field electrode 12 ground connection of tested explosive loading parts, first triggers probe 5 and is connected the output terminal connection pulse forming network that triggers probe 6, and the output of pulse forming network connects the first oscillograph; The 3rd triggering probe 7 gating pulse constant current sources of tested explosive loading parts provide constant current signal for the manganese-copper piezoresistance sensor 15 of tested explosive loading parts, and the output terminal of manganese-copper piezoresistance sensor 15 connects the first oscillograph.
The specific works process is as follows: at first, capacitance energy storage and charhing unit are started working, utilize power supply, HVDC converter, the first current-limiting resistance etc. that energy-storage capacitor is charged to the given voltage value, and by the second current-limiting resistance high voltage is carried on the blast synchro switch.Then, start working in pulse width control unit and the propagation of explosion unit that detonates, initiator control blasting cap initiation, and then ignite the first primacord fuse, the detonation wave of the first primacord fuse input is converted to the second primacord fuse and the 3rd primacord fuse is exported detonation wave simultaneously by the blast shunt, wherein to drive the blast synchro switch closed for the second primacord fuse, and the high voltage of energy-storage capacitor is carried on the tested explosive loading parts; The 3rd primacord fuse directly is connected on the tested explosive loading parts, realizes detonating of tested explosive.And the length of the second primacord fuse and the 3rd primacord fuse is set as respectively l owing to can accurately be controlled respectively
1And l
2, the explosion velocity v of primacord fuse is relatively stable, therefore utilizes the length difference between the second primacord fuse and the 3rd primacord fuse can control the time interval t=l that explodes between synchro switch closure and two time points of tested explosive initiation
2-l
1/ v also is the pulse width that is carried in pulse high-voltage on the tested explosive.At last, explosion velocity detonation pressure test cell and high pressure resistant test cell are started working, and utilize first to trigger probe and pulse forming network etc. and measure detonation rate behind the tested explosive initiations; Utilize manganese-copper piezoresistance sensor, pulsed constant current supply, second to trigger the change curve that probe etc. is measured detonation pressure behind the tested explosive initiations; Utilize the change in voltage curve that is loaded in the whole process before and after the tested explosive initiation of the measurements such as resitstance voltage divider and the second oscillograph on the tested explosive.According to above-mentioned test result, and contrast high voltage performance, sequential that the typical detonation property parameter of tested explosive can draw tested explosive detonate stability and detonation output performance etc.
By initiator control primer detonator, detonator and then ignite the first primacord fuse and realize propagation of explosion utilizes primacord fuse length can accurately control the propagation of explosion time among the present invention, and initiator can adopt traditional engineering detonation hand-held initiator.
Utilize blast shunt, the second primacord fuse and the realization of the 3rd primacord fuse to the synchronous by-passing of the first primacord fuse.Wherein the second primacord fuse connects the blast synchro switch, expands by the explosive in the second primacord fuse, drives the blast synchro switch closed, but switch closure required time Accurate Measurement.Behind the switch closure, the energy-storage capacitor that is connected with the second current-limiting resistance is carried in high voltage on the tested explosive loading parts; And the tested explosive that detonates after the 3rd primacord fuse elapsed time t time-delay.Owing to having electric conductivity in the explosive detonation process, thus explosive detonated after near short-circuit condition, the high voltage pulse that be loaded on the tested explosive loading parts this moment blocks.And by testing and calculate the parameters such as blast synchro switch closure time, tested explosive initiation time, the explosion velocity of Rational choice primacord fuse, and the length l of the second primacord fuse
1Length l with the 3rd primacord fuse
2, utilize formula t=l
2-l
1/ v can realize the accurate control to high voltage pulse width t.
Described tested explosive detonation velocity survey mainly utilizes the 1st to trigger the realizations such as probe, pulse forming network, the 1st oscillograph.Trigger probe with two groups and be carried in respectively tested explosive side, and determine the distance between two groups of probes, pulse forming network is connected to the triggering probe end.When tested explosive detonation triggers probe through one group, because the detonation product of explosive has certain electric conductivity, this group probe is connected, connected pulse forming network will produce a pulse signal.Corresponding time pulse signal interval when connecting by two groups of probes of the first oscillograph recording, and then measure the detonation rate of explosive.
Described tested explosive detonation pressure survey mainly utilizes manganese-copper piezoresistance sensor, pulsed constant current supply, second to trigger the realizations such as probe, the first oscillograph, manganese-copper piezoresistance sensor is contained in tested explosive by the lucite spacer on the tested explosive loading parts terminal, its two lateral electrode connects respectively pulsed constant current supply and oscillograph.Second triggers shorting pin loaded at tested explosive middle part, and connection pulsed constant current supply trigger end, behind the explosive initiation, during through the triggering probe, the probe conducting, thus the trigger pulse constant current source begins power supply to manganese-copper piezoresistance sensor, when detonation is transferred to tested explosive end, when manganese-copper piezoresistance sensor produces output pressure, by the oscillograph recording pressure curve, draw the detonation pressure of explosive by lucite spacer.
High pressure resistant test cell mainly is comprised of resitstance voltage divider and the second oscillograph, and this unit is mainly used in realizing being carried in pulse high-voltage waveform on the tested explosive and the dielectric voltage withstand performance of tested explosive is measured.The high-voltage probe of resitstance voltage divider is connected between blast synchro switch and the tested explosive loading parts, and after the conducting of blast synchro switch, the high voltage of energy-storage capacitor is carried on the tested explosive loading parts by the second current-limiting resistance, blast synchro switch.Behind tested explosive initiation, because detonation product has certain conductivity, magnitude of voltage descends rapidly, this process can be utilized resitstance voltage divider and the second oscillograph recording, its T.T. is usually less than 100 μ s, change according to the voltage waveform that records on the oscillograph, whether deducibility goes out tested explosive high voltage performance and meets the requirements, thereby realizes tested explosive dielectric voltage withstand performance is measured.
Claims (6)
1. tested explosive loading parts is characterized in that comprising that primacord fuse connecting hole (1), Hi-pot test dull and stereotyped (2), high-field electrode (3), epoxy resin (4), first trigger probe (5), second and triggers probe (6), the 3rd triggering probe (7), nylon outer shell (8), lucite spacer (9), teflon limit lid (12), teflon shell (13), low-field electrode (14), low voltage experiment dull and stereotyped (15), manganese-copper piezoresistance sensor (18) and plexiglass base plate (11); Axis at teflon shell (13) is provided with a rectangular through-hole, and rectangular through-hole is divided into two sections; Wherein be respectively equipped with Hi-pot test flat board (2) and low voltage experiment dull and stereotyped (15) on one section two relative plane, end face is provided with teflon limit lid (12), and the center of teflon limit lid (12) is provided with primacord fuse connecting hole (1); Another section is provided with three grooves that spacing equates, end face is provided with manganese-copper piezoresistance sensor (18) and plexiglass base plate (11); The outside of teflon shell (13) is epoxy resin (4), and the outside of epoxy resin (4) is nylon outer shell (8); High-field electrode (3) is connected on the Hi-pot test flat board (2), its lead-in wire passes epoxy resin (4) to nylon outer shell (8), low-field electrode (14) is connected on the low voltage experiment flat board (15), and its lead-in wire passes epoxy resin (4) to nylon outer shell (8); First triggers probe (5), the second triggering probe (6) and the 3rd triggering probe (7) is placed in the rectangular through-hole by three grooves successively by the center, and on the interior tested explosive of insertion rectangular through-hole, the lead-in wire of three triggering probes passes epoxy resin (4) to nylon outer shell (8).
2. explosive detonation characteristic test macro under the pulse high-voltage of employing tested explosive loading parts claimed in claim 1 is characterized in that comprising capacitance energy storage and charhing unit, blast synchro switch, initiator, detonator, the first primacord fuse, blast shunt, the second primacord fuse, the tested explosive loading parts of the 3rd primacord fuse, pulse forming network, pulsed constant current supply and the first oscillograph; The test macro annexation is: initiator, detonator and the first primacord fuse are sequentially connected, and the output of the first primacord fuse connects the blast shunt, output parallel join the second primacord fuse and the 3rd primacord fuse of blast shunt; The so-called output control of the second primacord fuse blast synchro switch, the high-field electrode of blast synchro switch input end connects the high-voltage output end of capacitance energy storage and charhing unit, and the high-field electrode of blast synchro switch output terminal connects the high-field electrode (3) of tested explosive loading parts; The output terminal of the 3rd primacord fuse is controlled tested explosive by the primacord fuse connecting hole (1) of tested explosive loading parts, the low-field electrode of tested explosive loading parts (12) ground connection, first triggers probe (5) and is connected the output terminal connection pulse forming network that triggers probe (6), and the output of pulse forming network connects the first oscillograph; The 3rd triggering probe (7) gating pulse constant current source of tested explosive loading parts is that the manganese-copper piezoresistance sensor (15) of tested explosive loading parts provides constant current signal, and the output terminal of manganese-copper piezoresistance sensor (15) connects the first oscillograph.
3. test macro according to claim 2 is characterized in that: the input end of blast synchro switch also connects the second oscillograph by resitstance voltage divider.
4. test macro according to claim 2, it is characterized in that: described capacitance energy storage and charhing unit comprise energy-storage capacitor, power supply, HVDC converter, the first current-limiting resistance and current-limiting resistance and the second current-limiting resistance; Power supply, HVDC converter, the first current-limiting resistance and energy-storage capacitor are sequentially connected and ground connection forms tank circuit, and energy-storage capacitor connects the high voltage input terminal of blast synchro switch by the second current-limiting resistance.
5. test macro according to claim 2 is characterized in that: described blast synchro switch comprises primacord fuse connecting hole (19), the first switch electrode (20), the first nylon sleeve (21), the second nylon sleeve (22), nylon limit lid (23), copper pipe (24), second switch electrode (25) and main blasting charge (26); (22 mutually inlay and consist of a cylinder for the first nylon sleeve (21) and the second nylon sleeve, the second nylon sleeve (22) is groove structure, the first nylon sleeve (21) is provided with nylon limit lid (23), the primacord fuse connecting hole (19 that the center of nylon limit lid (23) is provided with, the center of cylinder is provided with main blasting charge (26), and wherein an end is connected with primacord fuse connecting hole (19); The outside of main blasting charge (26) is provided with copper pipe (24), the first switch electrode (20) passes the first nylon sleeve (21) and is connected with copper pipe (24), second switch electrode (25) is located at the outer ring of copper pipe (24) for ring-type, be provided with first nylon sleeve (21) of insulation between second switch electrode (25) and the copper pipe (24), the lead-in wire of two switch electrodes is worn to the first nylon sleeve (21); Described the first switch electrode (20) is the high-field electrode of input end, and described second switch electrode (25) is the high-field electrode of output terminal.
6. test macro according to claim 1, it is characterized in that: described the second primacord fuse and the 3rd primacord fuse are carried on the tested explosive and form high voltage pulse, and the high voltage pulse width depends on primacord fuse explosion velocity v, the second primacord fuse length 1
1With the 3rd primacord fuse length l
2, satisfy relational expression t=(l
2-1
1)/v, wherein t is the high voltage pulse width that is carried on the tested explosive.
Priority Applications (1)
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| CN104764899A (en) * | 2015-03-23 | 2015-07-08 | 安徽理工大学 | Explosive detonation velocity test method |
| CN104965098A (en) * | 2015-07-03 | 2015-10-07 | 湖北东神天神实业有限公司 | Quick mounting apparatus for explosive explosion velocity probe |
| CN105043634A (en) * | 2015-07-09 | 2015-11-11 | 大连理工大学 | Method for measuring detonation pressure of explosive in blast hole |
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| CN105043634A (en) * | 2015-07-09 | 2015-11-11 | 大连理工大学 | Method for measuring detonation pressure of explosive in blast hole |
| CN105486597B (en) * | 2015-11-23 | 2018-01-05 | 中国人民解放军理工大学 | A kind of pulse shaping networking of high-pressure metal appendix crack growth test system |
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| CN108956932A (en) * | 2018-07-12 | 2018-12-07 | 宏大爆破有限公司 | A kind of continuous measurement explosion velocity device and method |
| CN110715583A (en) * | 2019-10-12 | 2020-01-21 | 西安交通大学 | Microscale explosive loading and explosion velocity testing system |
| CN110926281A (en) * | 2019-12-19 | 2020-03-27 | 西安交通大学 | Micro-scale explosive loading detonation pressure and detonation velocity testing system based on MEMS pressure conduction probe |
| CN110926281B (en) * | 2019-12-19 | 2021-02-02 | 西安交通大学 | Micro-scale explosive loading detonation pressure and detonation velocity testing system based on MEMS pressure conduction probe |
| CN113030180A (en) * | 2021-04-15 | 2021-06-25 | 中国工程物理研究院激光聚变研究中心 | Explosive overpressure detonation device and performance testing method |
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