CN2279695Y - Armature type combined switch - Google Patents

Abstract

The utility model discloses an armature type combined switch and comprises an outer shell, an insulating bottom plate, a current conducting supporting rack and three electrodes. The armature type combined switch is characterized in that an armature is pushed to move through detonating powder in the first electrode to successively communicate the three electrodes in the combined switch. The electrical discharge circuit structure is caused to change, and the function of two large power switches can be achieved. The purpose of reshaping the electric current is achieved. The armature type combined switch has the advantages of simple structure, no adjunction time order controlling circuit, no switch wrong action, high reliability, good controllability, good repetitiveness and low cost and can be widely used for reshaping various large power electrical discharge electric current.

Description

The armature type unit switch

The utility model relates to a kind of high power switch, particularly a kind of armature type unit switch.

High power switch mainly is the shaping that is used for highpowerpulse discharge circuit electric current.In highpowerpulse discharge technology field, because discharge circuit has electric current big (reaching tens KA～several MA), operating voltage height (tens～hundreds of KV) and discharge energy height characteristics such as (tens～hundreds of MJ), therefore, the high power switch technology that is used for sort circuit just becomes one of its crucial technology, at present, all the current shaping that adopts two high power switchs to make up to finish the high power discharge circuit in the prior art, adopt the reason of this method to be, in RLC discharge circuit commonly used, its electric current all is an oscillation mode, and in a lot of occasions, the current waveform that requires must be non-oscillation mode, so an only major loop high power switch K in the rlc circuit ₁Just can not satisfy this requirement, the method for solution is to add an auxiliary high power switch K in rlc circuit again ₂(being Crowbarswitch).Generally there are two kinds for auxiliary high power switch, the one, the series and parallel unit switch of employing heavy-duty diode, abroad make in this way more, but this switching device cost is very high, needs tens usually to units up to a million, in addition, when unexpected overvoltage or overcurrent occurring in the discharge circuit, the heavy-duty diode group is easy to damage, and cost is very high, is difficult at home popularize use; Another kind is to adopt the auxiliary switch of explosion switch as RLC, and this switch is made up of shell, priming, battery lead plate, insulating barrier, former etc., when priming is controlled detonate after, the high-pressure shocking wave of generation makes the distortion of first battery lead plate; And crush following insulating barrier, and make it and the second battery lead plate conducting, finish switching process, former is used to guarantee large-area reliable contact between the battery lead plate.But this switch has some insoluble problems again, and at first, because explosion switch needs sequential control circuit, under the strong-electromagnetic field environment, control circuit is subject to disturb, and makes the switch misoperation; Second, because during the major loop discharge, be conducting to the time very short (tens～hundreds of μ S) that electric current reaches second peak value from main switch, make the ON time (initiation process that comprises priming of explosion switch, mechanical turn on process between the battery lead plate) satisfies its requirement, difficulty is very big, and domestic have unit to adopt the method, but the current shaping effect is all undesirable.

The purpose of this utility model is to provide a kind of simple in structure, reliable operation, the good and moderate highpowerpulse circuit armature type unit switch of shaping effect.

The purpose of this utility model is achieved through the following technical measures, the armature type unit switch, it comprises shell, insulating base, conducting bracket and electrode, it is characterized in that having three by the electrode that conducting bracket is fixed on the base plate, wherein first electrode is by the armature emitter, priming and cylindrical armature are formed, have coyote hole and emission cavity in the armature emitter, also have the groove of holding one's breath along the emission cavity inner peripheral wall, priming is installed in the coyote hole of armature emitter, blastic fuse is drawn from the emitter base apertures, cylindrical armature inward at both ends has cavity, filler is arranged in the cavity, and filler can play cushioning effect, and the gases at high pressure after it can prevent to detonate effectively are to the impact failure of armature.Armature is positioned in the emission cavity of emitter, and can slide vertically; Second electrode is the metallic plate of a center drilling, and its center bore should be slightly larger than the diameter of cylindrical armature; Third electrode is made up of armature receiver and flow of metal plate, and the armature receiver has groove, and filler is arranged in the groove, and the flow of metal plate is fixed on the armature receiver groove end face; First, second and third electrode hole is coaxial, and the spacing of first and second electrode and third and fourth electrode is less than the length of armature, and second and third electrode spacing is adjustable.Armature type unit switch described in the utility model with being connected of external circuit is in use: first electrode links to each other with the anode of capacitor in the external circuit, and second electrode links to each other with inductor in the external circuit, and third electrode links to each other with the negative electrode of capacitor in the external circuit.Their course of work is as follows, priming is controlled detonate after, in coyote hole, produce gases at high pressure rapidly, the armature that is positioned at emission cavity under the promotion of gases at high pressure vertically to second electrode movement, and penetrate in the centre bore of second battery lead plate, at this moment, armature is connected first and second electrode, capacitor is to inductor and load discharge, armature continues to enter armature receiver by the juxtaposition metamorphose metallic plate through Δ t after the time, at this moment to third electrode accelerated motion, armature is connected second and third electrode, and circuit structure transfers the RL circuit to.By the speed of control armature and the spacing of second and third electrode, control the time of armature from second electrode to third electrode, promptly control the ON time that is conducting to second and third electrode, thereby reach shaping purpose discharging current from first and second electrode.

The utility model compared with prior art, its significant advantage is: the unit switch that has utilized a new structure, realized the function of two high power switchs in the past, promote armature movement by priming, connect a plurality of electrodes in the unit switch successively, the discharge circuit structure is changed, reach the current shaping purpose; This unit switch is simple in structure, no additional hours sequence control circuit, and the switch misoperation of both having avoided electromagnetic interference to cause has improved the reliability of switch again; In addition, because armature movement speed is very fast, the ON time of internal electrode is extremely short, so that the controllability of this unit switch and repeatability are all better, cost only is 1/20 of a heavy-duty diode group, simultaneously, and when unit switch uses in reality, only need to change armature, priming and deformable metal plate, experimental expenses is very little.

Concrete structure of the present utility model is provided by the following drawings and embodiment.

Fig. 1 is the overall structure schematic diagram according to armature type unit switch described in the utility model.

Fig. 2 is the planform schematic diagram of electrode emitter in armature type unit switch first electrode.

Fig. 3 is the connection line schematic diagram of armature type unit switch and external circuit.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Referring to Fig. 1, the armature type unit switch is made up of shell 1, insulating base 2, conducting bracket 3 and three electrodes, and three electrodes are fixed on the insulating base 2 by conducting bracket 3 respectively.First electrode is made up of armature emitter 4, priming 5, armature 6.Referring to Fig. 2, armature emitter 4 is a long 200mm, the cylinder of diameter phi 25mm, armature emitter 4 inwardly has emission cavity (4b) and coyote hole (4a) from an end, the long 120mm of emission cavity, the emission cavity aperture is greater than the coyote hole aperture, also has the fairlead that detonates in coyote hole (4a) bottom, on the inwall of emission cavity (4b), have the groove of holding one's breath (4c), priming 5 is the voltage 5KV that detonates, the electric cap of electric energy 6J detonates, it is fixed on the bottom of coyote hole (4a), lead-in wire is drawn from the hole, armature 6 is positioned at emission cavity (4b), its long 60mm, diameter phi 10mm, diameter matches with the aperture of emission cavity (4b), inward at both ends has φ 6mm and long 20mm, the cavity of 30mm, filler 7 in the cavity is selected paraffin wax, the outer surface of armature 6 scribbles conductive coating, can select graphite, it both can prevent that the gas that priming produces in the coyote hole from leaking outside, and was lubricious when armature 6 is moved in emission cavity, also can prevent armature 6 simultaneously when entering second electrode hole, the armature that the electrode metal part is dissolved produce owing to heavy-current discharge and the adhesion of hole wall; Second electrode is a thick 5mm, the square 45 of length of side 150mm ^#Steel plate, its center bore is slightly larger than the diameter of armature 6 in first electrode, is φ 11mm; Third electrode is made up of armature receiver 9 and deformed plate 10, and the armature receiver material is 45 ^#Steel, an end has φ 11mm, and the filler 11 in the cavity of dark 20mm, cavity is a paraffin wax, and deformed plate 10 is the stereotype of thick 2mm, and it is screwed on the receiving plane of armature receiver 9, and is replaceable.First, second electrode hole and third electrode must be coaxial, priming 5 and lead-in wire and emitter 4 should insulate, the available polyethylene film, first, second electrode hole spacing should guarantee not puncture under operating voltage, this example is 20mm, third electrode can move forward and backward on conducting bracket 3, and in this example, second and third electrode spacing is 15mm.Shell 1 covers on the base plate 2.According to the armature type unit switch that the utility model is made, three electrodes were seen Fig. 3 with being connected of external circuit when it used.

Claims (2)

1, a kind of armature type unit switch, it comprises shell [1], insulating base [2], conducting bracket [3] and electrode, it is characterized in that having three by the electrode that conducting bracket [3] is fixed on the base plate [2], wherein first electrode is by armature emitter [4], priming [5], cylindrical armature [6] are formed, have coyote hole [4a] and emission cavity [4b] in the armature emitter [4], also have the groove of holding one's breath [4c] along the emission cavity inner peripheral wall; Priming [5] is installed in the coyote hole [4a], and blastic fuse is drawn from emitter [4] base apertures, and armature [6] inward at both ends has cavity, and filler [7] is arranged in the cavity, and armature [6] is placed in the emission cavity [4b] of emitter [4], and can slide vertically; Second electrode is the metallic plate [8] of a center drilling, and its center bore is greater than the diameter of armature [6]; Third electrode is made up of armature receiver [9] and the flow of metal plate [10] that is fixed on armature receiver groove end face, and filler [11] is arranged in the groove of armature receiver; First, second and third electrode hole is coaxial, and spacing is less than the length of cylindrical armature [6], and second and third electrode spacing is adjustable.

2, armature type unit switch according to claim 1 is characterized in that the periphery of armature in first electrode scribbles conductive coating.

Images