CN108832485A - A kind of Multiple level series direct current gas switch of low activation threshold value - Google Patents
A kind of Multiple level series direct current gas switch of low activation threshold value Download PDFInfo
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- CN108832485A CN108832485A CN201810613883.1A CN201810613883A CN108832485A CN 108832485 A CN108832485 A CN 108832485A CN 201810613883 A CN201810613883 A CN 201810613883A CN 108832485 A CN108832485 A CN 108832485A
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- direct current
- threshold value
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T2/00—Spark gaps comprising auxiliary triggering means
- H01T2/02—Spark gaps comprising auxiliary triggering means comprising a trigger electrode or an auxiliary spark gap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/16—Series resistor structurally associated with spark gap
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/20—Means for starting arc or facilitating ignition of spark gap
- H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes
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Abstract
The present invention relates to a kind of Multiple level series direct current gas switch of low activation threshold value, which includes switch outer chamber, electrode supporting structure, triggering introducing structure, resistance-capacitance network and ultraviolet preionization structure；Resistance-capacitance network and electrode supporting structure integrated design, ultraviolet preionization structure and triggering introduce structure-integrated design；Electrode supporting structure and resistance-capacitance network include interior insulation cylinder, upper high-field electrode, lower high-field electrode, odd number target, equalizing resistance line, upper surface electrode, lower end surface electrode, multiple connection terminals and an at least capacitor.Multiple level series direct current gas switch of the present invention solves the technical issues of existing gas switch activation threshold value is unable to satisfy demand, ultraviolet preionization structure, resistance-capacitance network and gas switch integratedization are designed, make switch performance be improved significantly, have a good application prospect in Linear transformer driver (LTD).
Description
Technical field
The present invention relates to a kind of Multiple level series direct current gas switch.
Background technique
Gas switch have the characteristics that it is high pressure resistant, through-flow it is strong, response is fast, small, the low inductance of loss, structure are simple, in Rapid Pulse
Linear transformer driver (FLTD) is rushed, has in MARX generator isopulse power source and is widely applied.FLTD can be generated directly
Hundred nanosecond forward position high power pulse, in the research in the fields such as Z constriction inertial confinement fusion, high energy trauma have it is important
Application prospect.In FLTD type pulsed drive source, the quantity of switch is more and needs accurately to trigger closure according to certain timing, therefore
FLTD proposes high requirement to the performance of gas switch.Gas switch is in self discharge probability, service life and firing level at present
Value etc. is unable to satisfy demand, becomes one of the bottleneck for restricting the development of FLTD technology.
A kind of Multiple level series direct current gas switch is widely used in domestic and international FLTD, and multiple gas gaps, which are in series with, to be conducive to
It obtains under lower electric field nonuniformity coefficient and lesser switch size compared with high working voltage.Russian high current electronics institute Kim
Et al. propose a kind of Multiple level series direct current gas switch that corona is pressed, the ultraviolet irradiation and freely charge that corona discharge generates
Particle is conducive to the triggering of switch.Switch operating voltage 200kV, inflates 0.38MPa, is 100kV with forward wave amplitude, forward position
When 50ns negative pulse is triggered by 500 Ω isolation resistances, switch triggering discharge lag 56ns, shake is less than 1.5ns.It is domestic
The units such as Xibei Nuclear Techn Inst, China Engineering Physics Research Institute have carried out the research of Multiple level series direct current gas switch,
Switch triggering breakdown time delay and shake are suitable with world level.
And in order to obtain the more preferable synchronous discharge characteristics of Multiple level series direct current gas switch, Multiple level series direct current
Gas switch generally requires to introduce higher trigger voltage in module application, and amplitude is generally higher than 100kV, leads to switch triggering system
It unites huge and complicated, therefore switch triggering threshold value need to be reduced.
Xibei Nuclear Techn Inst Sun Tie equality people introduces ultraviolet preionization measure in stack-type multi-gap gas switch,
Switch triggering shake is reduced by about 20%, and switch triggering voltage threshold reduces about 10kV.
Referring to document " the macro fine jade, Wang Zhiguo drop, Sun Fengju waits the low activation threshold value multi-gap gas switch of parallel coupled resistor capacitor
Flash-over characteristic research [C] // 5th whole nation pulse power meeting (CPPC2017), Xining, 2017 ".In the document, northwest core
Macro fine jade of the drop of technical research institute et al. proposes that a kind of Multiple level flow-through gas switch in parallel capacitance resistance network reduces switch triggering
The method of threshold value.Change the distribution of each gap equivalent parameters by introducing capacitance resistance network, presses through switch DC charging is resistance to
Each gap voltage distribution is controlled by resistor network in journey, and in the distribution of trigger process intermediate gap voltage by the control of capacitance network.
Original reason experiment is the result shows that trigger voltage amplitude can be down to by switch operating voltage ± 80kV, service factor 60% by 110kV
75kV, shake are down to 1.4ns by 3.2ns.
But the switching capacity resistor network is that multiple discrete components are connected in parallel on switch external at present, needs to increase multiple draw
Terminal and sealing part out keep switch processing, assembling process more complicated, and failure rate increases；And leading-out terminal is exposed is opening
Outside the Pass, it is easy to happen insulation breakdown, is unfavorable for the engineer application of switch, the activation threshold value needs in addition switched further decrease.
Summary of the invention
In order to further decrease the activation threshold value of Multiple level series direct current gas switch, existing gas switch capacitor electricity is solved
Resistance network is that multiple discrete components are connected in parallel on many technical problems present in switch external, and the invention proposes a kind of low triggerings
The Multiple level series direct current gas switch of threshold value.
A kind of Multiple level series direct current gas switch of low activation threshold value of the present invention, including switch outer chamber, electrode supporting
Structure, triggering introduce structure；It is characterized in that：
It further include capacitance resistance network and ultraviolet preionization structure；The capacitance resistance network and electrode supporting structure one
Change design, the ultraviolet preionization structure and triggering introduce structure-integrated design；
Electrode supporting structure and capacitance resistance network include interior insulation cylinder 5, upper high-field electrode 8, lower high-field electrode 9, odd number
A target 10, equalizing resistance line 6, upper surface electrode 17, lower end surface electrode 18, multiple connection terminals 16 and an at least electricity
Hold 7；
Interior insulation cylinder 5 is evenly arranged with multiple through-holes along axial direction, multiple through-holes helically arrange and with electricity among odd number
Pole 10 corresponds, and multiple connection terminals 16 are arranged in a one-to-one correspondence in multiple through holes, and one end of each connection terminal 16 is located at
In interior insulation cylinder 5, the other end of each connection terminal 16 is located at outside interior insulation cylinder 5；
Odd number target 10 is annular electrode, and odd number target 10 is axially arranged in interior insulation cylinder 5, odd
Several one-to-one correspondence of target 10 are located at one end in interior insulation cylinder 5 with multiple connection terminals 16 and are electrically connected；
Upper surface electrode 17 and lower end surface electrode 18 are located at the upper and lower ends of interior insulation cylinder 5；
6 spiral surrounding of equalizing resistance line is in the outside of interior insulating cylinder 5, the lower end of equalizing resistance line 6 and lower end surface electrode 18
Connection, the upper end of equalizing resistance line 6 are connect with upper surface electrode 17, the middle part of equalizing resistance line 6 and multiple connection terminals 16
It is connected in one end outside interior insulation cylinder 5, upper surface electrode 17, lower end surface electrode 18 and multiple connection terminals 16 are by equalizing resistance line
6 are divided into the equal resistance line segment of multiple resistance values；
Upper high-field electrode 8 is arranged in the top of upper surface electrode 17 and is electrically connected with upper surface electrode 17, lower high-field electrode 9
The lower section of lower end surface electrode 18 is set and is electrically connected with lower end surface electrode 18, upper high-field electrode 8, lower high-field electrode 9 and odd number
Multiple equidistant electrode gaps are formed between a target 10；
The capacitor 7 is located in interior insulation cylinder 5 to be arranged in parallel with electrode gap；
The triggering introduces structure and ultraviolet preionization structure setting on trigger electrode, and the trigger electrode is upper high pressure
Centrally located one in electrode 8, lower high-field electrode 9 and odd number target 10；
Triggering introduces structure and ultraviolet preionization structure includes that ceramic insulating tube 12, first triggers the triggering needle of needle 13, second
19, high-tension resistive 14 and metal collar 15,
The ceramic insulating tube 12, first triggers needle 13, high-tension resistive 14, metal collar 15 and the formation of cylindrical electrode 20
The triggering of one entirety introduces structure；It is therein first triggering needle 13 include coaxial arrangement head and tail portion, head be with
The elongate cylinder electrode at tip, head penetrates in ceramic insulating tube 12 and tip is stretched out, and tail portion is cylindrical electrode 20, cylindrical
Electrode 20 connects with ceramic insulating tube 12；The metal collar 15 is set on ceramic insulating tube 12；The high-tension resistive 14
In the outside of ceramic insulating tube 12, and it is located between the first triggering 13 tail portion of needle and metal collar 15, one end of high-tension resistive 14
It is connect with the first triggering 13 tail portion of needle, the other end is connect with metal collar 15；
The triggering introduces structure and sequentially passes through switch outer chamber and interior insulation cylinder 5, and the first triggering needle 13 protrudes into triggering electricity
In the inner hole of pole, the metal collar 15 is electrically connected with trigger electrode, and the cylindrical electrode 20 connects with switch outer chamber sealing
It connects；
The second triggering needle 19 is arranged on the inner wall of trigger electrode and is oppositely arranged with the first triggering needle 13, the first touching
Ultraviolet preionization discharging gap is formed between hairpin 13 and the second triggering needle 19.
Further, described to press in order to guarantee the homogeneity of reliability of structure, compactedness and each resistance line segment resistance value
Resistive conductor 6 is to be coated or be printed in outside interior insulation cylinder 5 by resistance slurry, made of high temperature sintering.
Further, about 5 two end face metal claddings of the interior insulation cylinder are as upper surface electrode 17 and lower end surface electricity
Pole 18.
Further, the center line of the through-hole is directed toward the central axes of insulating cylinder, and the connection terminal 16 is by through-hole
Wall metal cladding is formed by, which extends to the inside and outside wall of insulation.
Further, the support member is ripple pearl screw 11.
Further, in order to position to target, and the connection with equalizing resistance line, the interior insulation cylinder are realized
5 inner wall is evenly arranged with multiple V-type annular grooves along axial direction, and multiple through-hole correspondences are provided at multiple V-type annular grooves；In each
Between the side wall of electrode 10 be provided with support member, odd number target 10 by respective support member it is corresponding be installed on it is multiple
At V-type annular groove, and one end in interior insulation cylinder 5 is located at connection terminal 16 by a support member correspondence and is electrically connected.
Ripple pearl screw on target is withstood on V-groove, pushes up tighter, and the axis of ripple pearl screw is closer to V-groove
Vertex.Even if having dislocation when installation, as screw is held out against, electrode can be automatically adjusted to the middle of V-groove.
Further, in order to increase the creepage distance of resistance, increase the voltage endurance capability of resistance.The resistance line segment is in wave
Shape, it is broad in the middle, it is small in ends.
Further, the quantity of the odd number target 10 is 5.
Further, the quantity of capacitor 7 is 2 in the capacitance resistance network, and two capacitors 7 are arranged in series in switch
On central axes, one of capacitor is arranged between upper high-field electrode 8 and immediate target 10, the setting of another capacitor
Below upper high-field electrode 8 between first target 10 and second target 10, close to the capacitor of upper high-field electrode 8
Greater than the capacitance of another capacitor.
Further, in addition to trigger electrode, remaining target 10 is provided centrally with electrode plate, in the electrode plate
The heart is provided with centre bore.
Compared with prior art, the present invention advantage is：
The direct current Multiple level series direct current gas switch of low activation threshold value of the invention, by ultraviolet preionization structure, capacitor
Resistor network and the design of gas switch integratedization, make switch performance be improved significantly, have in FLTD driving source good
Application prospect, embody in the following areas：
1, activation threshold value is low：The Multiple level series direct current gas switch of low activation threshold value of the invention is in switch triggering pulse
After arrival, ultraviolet preionization gap punctures first, generates ultraviolet irradiation and initial plasma, facilitates triggered gap breakdown,
Subsequent capacitance resistance network makes on pulse voltage concentrated loading to triggered gap.Ultraviolet preionization and capacitance resistance network cooperating are made
With switch triggering threshold value is effectively reduced.
2, high reliablity：The Multiple level series direct current gas switch of low activation threshold value of the invention is by ultraviolet preionization, electricity
Hold resistor network and Multiple level series direct current gas switch integrated design, solves that switch component is external, reliability is low
Problem is conducive to switch large-scale application.
3, operating voltage is high, and stability is good：The Multiple level series direct current gas switch of low activation threshold value of the invention, resistance
Network evenly distributes switch voltage during DC break down voltage, is conducive to the stability of switch；In addition, capacitance resistance network and
Ultraviolet preionization device is placed in switch inside cavity, and with the increase of air pressure, the insulating capacity of each component creeping discharge is therewith
Increase, is conducive to improve switch operating voltage and stability.
4, long service life：The Multiple level series direct current gas switch of low activation threshold value of the invention, resistor network are placed in
Insulate drum outer wall, and it is dirty to the sputtering of resistance to the direct irradiation and electrode erosion of resistance to avoid ultraviolet light that electric discharge generates etc.
Dye is conducive to increase switch life.
5, construction of switch is compact, and assembly method is simple.
Detailed description of the invention
Fig. 1 is the schematic cross-section of six gap gas switch of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of equalizing resistance of embodiment of the present invention line and interior insulation cylinder；
Fig. 3 is that triggering of the embodiment of the present invention introduces structure and ultraviolet preionization structure and the mounting structure of trigger electrode is illustrated
Figure；
Fig. 4 is the schematic diagram that triggering of the embodiment of the present invention introduces structure；
Fig. 5 is six gap switch equivalent circuit diagram of the embodiment of the present invention；
Wherein appended drawing reference is：External electrode, 3- external insulation cylinder, 5- interior insulation cylinder, 6- equalizing resistance under the upper external electrode of 1-, 2-
High-field electrode, 10- target, 11- ripple pearl screw, 12- ceramic insulating tube, 13- under line, 7- capacitor, the upper high-field electrode of 8-, 9-
First triggering needle, 14- high-tension resistive, 15- metal collar, 16- connection terminal, the upper surface 17- electrode, the lower end surface 18- electrode,
19- second triggers needle, 20- cylindrical electrode.
Specific embodiment
The present invention relates to a kind of Multiple level series direct current gas switch of low activation threshold value.Its core concept is：It will be ultraviolet
Preionization, capacitance resistance network and Multiple level series direct current gas switch integrated design, capacitance resistance network and electrode supporting
Structure combines, ultraviolet preionization structure introduces in conjunction with structure with switch triggering, realizes the low of Multiple level series direct current gas switch
Threshold triggers.
The following further describes the present invention with reference to the drawings.
As shown in Figs. 1-2, low activation threshold value gas switch mainly includes that switch outer chamber, electrode supporting structure, triggering are drawn
Enter structure, capacitance resistance network and ultraviolet preionization structure.
Switch outer chamber plays the role of sealing gas and connection high pressure.Outer chamber is mainly by upper external electrode 1, lower external electrode
2, external insulation cylinder 3 and gas nozzle etc. are constituted.The side that upper external electrode 1, lower external electrode 2 are crimped with external insulation cylinder 3 using screw thread respectively
Formula, the screw thread at both ends form a seal cavity after screwing.3 both ends of external insulation cylinder have sealed groove to be used to realize the close of outer chamber
Envelope, side-wall hole is used to connect gas nozzle and triggering introduces structure.Gas nozzle can carry out gas exchanges and air pressure adjustment.External insulation cylinder 3
Generally use the high mechanical strengths such as nylon, organic glass and electrical insulation strength material.
Electrode supporting structure and capacitance resistance network include interior insulation cylinder 5, upper high-field electrode 8, lower high-field electrode 9, odd number
A target 10, equalizing resistance line 6, upper surface electrode 17, lower end surface electrode 18, multiple connection terminals 16 and an at least electricity
Hold 7；The inner wall of interior insulation cylinder 5 is evenly arranged with the multiple and one-to-one annular groove of odd number target 10 along axial direction, often
A through-hole is provided on a annular groove, the through-hole on multiple annular grooves is helically arranged；Multiple connection terminals 16 are correspondingly arranged
In multiple through holes, one end of multiple connection terminals 16 is located in interior insulation cylinder 5, and the other end of multiple connection terminals 16 is located at interior
Outside insulating cylinder 5；Target 10 is annular electrode, and the side wall of target 10 is provided with support member, odd number target
10 are installed at multiple annular grooves by respective support member correspondence, and each target 10 is corresponding by a support member
It is located at one end in insulating cylinder with connection terminal 16 to be electrically connected；Upper surface electrode 17 and lower end surface electrode 18 are located at interior insulation
The upper and lower ends of cylinder 5；6 spiral surrounding of equalizing resistance line is in the outside of interior insulating cylinder 5, the lower end and lower end surface of equalizing resistance line 6
Electrode 18 connects, and the upper end of equalizing resistance line 6 is connect with upper surface electrode 17, the middle part of equalizing resistance line 6 and multiple connecting pins
Son 16 is located at one end connection outside interior insulation cylinder 5, and upper surface electrode 17, lower end surface electrode 18 and multiple connection terminals 16 will be pressed
Resistive conductor 6 is divided into the equal resistance line segment of multiple resistance values；Upper high-field electrode 8 is separately positioned on interior insulation cylinder 5 with lower high-field electrode 9
Upper and lower ends, upper high-field electrode 8 is electrically connected with upper surface electrode 17, and lower high-field electrode 9 is electrically connected with lower end surface electrode 18, on
Multiple equidistant electrode gaps are formed between high-field electrode 8, lower high-field electrode 9 and odd number target 10；Capacitor 7 is located at interior
It is arranged in parallel in insulating cylinder 5 with electrode gap.
As shown in Figure 1, Figure 3, triggering introduces structure and ultraviolet preionization structure setting on trigger electrode, and trigger electrode is
One is located in the middle in upper high-field electrode 8, lower high-field electrode 9 and odd number target 10.As shown in figure 4, triggering introduces
Structure and ultraviolet preionization structure include that ceramic insulating tube 12, first triggers the triggering of needle 13, second needle 19, high-tension resistive 14 and gold
Belong to lantern ring 15, ceramic insulating tube 12, first triggers needle 13, high-tension resistive 14, metal collar 15 and cylindrical electrode 20 and forms one
A whole triggering introduces structure；First triggering needle 13 therein includes the head and tail portion of coaxial arrangement, and head is with point
The elongate cylinder electrode at end, head penetrates in ceramic insulating tube 12 and tip is stretched out, and tail portion is cylindrical electrode 20, tail portion it is straight
The diameter that diameter is greater than ceramic insulating tube 12 connects with ceramic insulating tube 12；Metal collar 15 is set on ceramic insulating tube 12；It is high
Piezoresistance 14 is located at the outside of ceramic insulating tube 12, and is located between the first triggering 13 tail portion of needle and metal collar 15, high-voltage electricity
One end of resistance 14 is connect with the first triggering 13 tail portion of needle, and the other end is connect with metal collar 15；Triggering introduces structure and sequentially passes through
External insulation cylinder 3 and interior insulation cylinder 5, the first triggering needle 13 protrude into the inner hole of trigger electrode, metal collar 15 and trigger electrode electricity
Connection, cylindrical electrode 20 and external insulation cylinder 3 are tightly connected；Second triggering needle 19 is arranged on the inner wall of trigger electrode and with the
One triggering needle 13 is oppositely arranged, and forms ultraviolet preionization discharging gap between the first triggering needle 13 and the second triggering needle 19.
Optimization, interior insulation cylinder 5 of the invention uses alumina ceramic material.Equalizing resistance line 6 is to pass through resistance slurry
Ceramic insulation cylinder outer surface is coated or is printed in, and high temperature sintering forms.The ring that 5 inner wall of interior insulation cylinder is carved in the axial direction
Shape slot is " V " type annular groove, and annular groove is uniformly distributed along insulating cylinder central axes are equidistant, fluting quantity and 10 quantity of target
Unanimously.A hole is provided on each annular groove, the central axes of insulating cylinder are directed toward in the axle center in hole.Hole and hole site are staggered 180 degree.Absolutely
Silver-plated two electrodes as equalizing resistance line 6 in two end faces up and down of edge cylinder.Each Kong Jun is coated with one layer of silver, and silver electrode extends
Connection terminal 16 to the inside and outside wall of insulating cylinder, as equalizing resistance line 6.The upper surface electrode 17 and lower end surface electrode of insulating cylinder
Resistive conductor is divided into several substitutional resistances by 18.Each 10 side wall of target is uniformly driveed there are three hole.By 11 conduct of ripple pearl screw
After support member is embedded in electrode aperture, withstand in the annular groove of insulating cylinder.One of screw withstands on resistance connection terminal 16
Silver electrode on, be connected with equalizing resistance line 6.Upper high-field electrode 8, lower high-field electrode 9 are crimped on the silvered face of insulating cylinder respectively
On with guarantee with the electrical contact of equalizing resistance line 6, multiple equidistant series gaps are consequently formed, when upper external electrode 1 and lower dispatch from foreign news agency
Pole 2 bear DC high voltage when, the voltage in each gap by insulating cylinder outside equalizing resistance line 6 even action distribution.
Odd number target 10 is annular electrode, and in addition to trigger electrode, the center 10 of remaining target 10 can be set
Electrode plate can also be not provided with by setting an electrode plate, which is the fixation for convenience of capacitor 7, if electrode plate is provided with, in electricity
It needs to open up the through-hole passed through for ultraviolet light on pole plate.
Ceramic capacitor can be selected in capacitor 7 in capacitance resistance network, and ceramic capacitor is placed on switch central axes, is clipped in two
The two poles of the earth of the centre of a electrode plate, capacitor 7 are connect with electrode plate by screw.Thus multistage ceramic capacitor series connection is sequentially formed,
And it is in parallel with switch gap.The capacitance of every grade of capacitor is inconsistent, when trigger pulse arrives, pulse voltage on each gap
Distribution amplitude is influenced by its shunt capacitance amount.The small gap of shunt capacitance amount obtains bigger pulse voltage and first punctures, with
Other gap voltages are redistributed again by capacitive effect afterwards, according to the ascending breakdown of shunt capacitance amount.Due to gap itself
With distribution capacity, and distribution capacity is generally smaller than the capacitance of ceramic condenser, therefore first gap being triggered be not in parallel
Ceramic capacitor.
Below by taking a kind of gas switch in six gaps as an example, in conjunction with attached drawing, the present invention is further described.
As shown in Figs. 1-2, a six gap flow-through gas switch, diameter 107mm, height 152m.In electrode supporting structure
Interior insulation cylinder 5 outer diameter 70mm, internal diameter 60mm, height 132mm.5 inner wall of interior insulation cylinder has 5 annular grooves, between slot and slot apart
21mm.Each target 10 is fixed on the side wall of interior insulation cylinder 5 by 3 ripple pearl screws 11.One of ripple pearl screw
11 withstand on the connection terminal 16 of resistance.It is the equalizing resistance line 6 of ring-wound, the total resistance value of equalizing resistance line 6 outside interior insulation cylinder 5
It is 6G ohm, resistance is 1G ohm between two connection terminals 16.10 diameter of target is 50mm, high 18mm.In each layer
Between electrode 10 there is metallic screw to withstand on connection terminal 16, therefore each gap resistance in parallel is to realize electrode and resistance
Electrical connection.6 both ends of equalizing resistance line crimp high-field electrode 8 and lower high-field electrode 9 respectively.Upper high-field electrode 8, lower high-voltage electricity
Switch is divided into the gap of 6 3mm by pole 9 and odd number target 10.Ceramic capacitor is located on switch central axes, 2 potteries
Porcelain condenser is in parallel with close to two gaps of upper 8 side of high-field electrode respectively, and capacitor pressure resistance is greater than 40kV, and capacity is respectively
600pF and 300pF.
Electrode supporting structure both ends have spring leaf with guarantee upper high-field electrode 8, lower high-field electrode 9 and upper external electrode 1 and under
The good electrical of external electrode 2 contacts.
Fig. 3 gives triggering and introduces the schematic diagram that structure is connect with trigger electrode.First triggering needle 13 passes through ceramic insulation
The second triggering needle 19 on pipe 12 and trigger electrode forms ultraviolet preionization discharging gap.High-tension resistive 14 is sintered in ceramic insulation
12 surface of pipe plays the role of that target 10 is kept to be in zero potential in switched charge pressure resistance, arrives in trigger pulse
When play the role of be isolated pulse.15 ring of metallic sheath screws in inside target 10 connection realized with electrode, fixed simultaneously
Triggering introduces structure.There is seal groove on first triggering 13 end electrode of needle, gas cavity may be implemented after mounting O-shaped sealing ring
Sealing.
12 overall diameter 8mm of ceramic insulating tube in trigger architecture, interior diameter about 3mm, long 35mm.First triggering 13 diameter of needle
2mm, head end diameter are reduced to 1mm needle point, across ceramic insulating tube 12 and reach trigger electrode center.Preionization triggered gap away from
From about 1mm.14 resistance value of high-tension resistive is 1M ohm, length 19.5mm.
Fig. 5 gives equivalent circuit diagram when switch work.Switch is made of 6 gaps, and each gap is parallel with resistance
Shunt capacitance C1 and C2 are distinguished in R, gap 1 and gap 2, and wherein C1 capacitance is greater than C2 capacitance.Gap 7 is preionization gap,
R2 is the high-tension resistive 14 that triggering is introduced into structure.Upper external electrode 1 connects positive voltage, and lower external electrode 2 connects negative voltage.In charging process
Since each gap is parallel with resistance R, the voltage of each allocations is equal.
After negative triggering pulse arrives, ultraviolet preionization gap 7 punctures first, in the switch between portion's generation ultraviolet light
Gap 3.Trigger pulse loads on series gap 1, gap 2, gap 3, not and capacitor due to gap 3, can be assigned to major part
Pulse amplitude, because this gap 3 punctures, 3 voltage of gap decline.Subsequent trigger pulse voltage is redistributed, until gap 2
Breakdown and gap 1 puncture.One half gap of positive polarity all punctures at this time, and trigger electrode current potential is flipped, the close anode of voltage
Property charging voltage, therefore switch one half gap of negative polarity by about 4 times of overvoltage, gap 4, gap 5, gap 6 puncture rapidly, from
And entire gas switch triggering closure.
The gas switch maximum operating voltage of the present embodiment is ± 100kV, and upper external electrode 1 connects positive polarity voltage, lower outer
Electrode 2 connects reverse voltage.It is triggered using negative pulse.Gas working dielectric is dry air.
The gas switch course of work is as follows：Switch ends application ± 100kV high direct voltage respectively first, between each series connection
Regulation of the gap by equalizing resistance line 6 is resistant to the voltage of 33.3kV.The trigger electrode hit exactly at this time is in upper 1 He of external electrode
The symmetrical shaft position of lower external electrode 2, since 1M ohm of high-tension resistives 14 connect, it is zero that entire triggering, which introduces structure potential,.
By forward position 10ns, after the negative high voltage pulse of amplitude 50kV is applied to triggering introducing structure, 1mm preionization gap is hit
It wears, ultraviolet irradiation is generated to each main discharge gap, while trigger pulse is influenced by distribution capacity and shunt capacitance, switch room
Gap is successively punctured from trigger electrode to positive high voltage pole.After switching positive polarity gap breakdown, trigger electrode potential be flipped with it is upper
Electrode potential difference is 200kV, in addition positive polarity gap breakdown is produced into ultraviolet irradiation and effective electron, it is rapid to switch negative polarity gap
Breakdown, so that entirely switch breakdown is on state.
The present embodiment gives sufficient explanation to summary of the invention, and those of ordinary skill is enough to illustrate through the invention
The content of book is implemented.Equalizing resistance line given by embodiment containing six gaps is the application one in gas switch
The application of kind typical way, switch is switched including but not limited to six gap flow-through gas, and can be also used for other includes multiple
The occasions such as the gas switch of gap.
Claims (10)
1. a kind of Multiple level series direct current gas switch of low activation threshold value, including switch outer chamber, electrode supporting structure, triggering
Introduce structure；It is characterized in that：
It further include capacitance resistance network and ultraviolet preionization structure；The capacitance resistance network is integrated with electrode supporting structure
Design, the ultraviolet preionization structure and triggering introduce what structure was the integrated design；
Electrode supporting structure and capacitance resistance network include interior insulation cylinder (5), upper high-field electrode (8), lower high-field electrode (9), surprise
Several targets (10), equalizing resistance line (6), upper surface electrode (17), lower end surface electrode (18), multiple connection terminals (16)
An and at least capacitor (7)；
Interior insulation cylinder (5) is evenly arranged with multiple through-holes along axial direction, multiple through-holes helically arrange and with odd number target
(10) it corresponds, multiple connection terminals (16) are arranged in a one-to-one correspondence in multiple through holes, one end of each connection terminal (16)
In interior insulation cylinder (5), the other end of each connection terminal (16) is located at interior insulation cylinder (5) outside；
Upper surface electrode (17) and lower end surface electrode (18) are located at the upper and lower ends of interior insulation cylinder (5)；
Equalizing resistance line (6) spiral surrounding is in the outside of interior insulating cylinder (5), the lower end of equalizing resistance line (6) and lower end surface electrode
(18) it connects, the upper end of equalizing resistance line (6) is connect with upper surface electrode (17), the middle part of equalizing resistance line (6) and multiple companies
Connecting terminal (16) is located at one end connection of interior insulation cylinder (5) outside, upper surface electrode (17), lower end surface electrode (18) and multiple connections
Equalizing resistance line (6) is divided into the equal resistance line segment of multiple resistance values by terminal (16)；
Odd number target (10) is annular electrode, and odd number target (10) is uniformly arranged on interior insulation cylinder along axial direction
(5) in, odd number target (10) one-to-one correspondence is located at one end in interior insulation cylinder (5) with multiple connection terminals (16) and is electrically connected
It connects；
Upper high-field electrode (8) is arranged the top in upper surface electrode (17) and is electrically connected with upper surface electrode (17), lower high-voltage electricity
Pole (9) is arranged the lower section in lower end surface electrode (18) and is electrically connected with lower end surface electrode (18), upper high-field electrode (8), lower high pressure
Multiple equidistant electrode gaps are formed between electrode (9) and odd number target (10)；
The capacitor (7) is located in interior insulation cylinder (5) to be arranged in parallel with electrode gap；
The triggering introduces structure and ultraviolet preionization structure setting on trigger electrode, and the trigger electrode is among odd number
Centrally located one in electrode (10)；
Triggering introduces structure and ultraviolet preionization structure includes ceramic insulating tube (12), the first triggering needle (13), the second triggering needle
(19), high-tension resistive (14) and metal collar (15),
The ceramic insulating tube (12), the first triggering needle (13), high-tension resistive (14), metal collar (15) and cylindrical electrode
(20) triggering for forming an entirety introduces structure；First triggering needle (13) therein includes the head and tail portion of coaxial arrangement,
Head is with cuspidated elongate cylinder electrode, and head penetrates in ceramic insulating tube (12) and tip is stretched out, and tail portion is cylinder
Electrode (20), cylindrical electrode (20) connect with ceramic insulating tube (12)；The metal collar (15) is set in ceramic insulating tube
(12) on；The high-tension resistive (14) is located at the outside of ceramic insulating tube (12), and is located at the first triggering needle (13) tail portion and gold
Belong between lantern ring (15), one end of high-tension resistive (14) is connect with first triggering needle (13) tail portion, the other end and metal collar
(15) it connects；
The triggering introduces structure and sequentially passes through switch outer chamber and interior insulation cylinder (5), and triggering electricity is protruded into the first triggering needle (13)
In the inner hole of pole, the metal collar (15) is electrically connected with trigger electrode, and the cylindrical electrode (20) and switch outer chamber are close
Envelope connection；
Second triggering needle (19) is arranged on the inner wall of trigger electrode and is oppositely arranged with the first triggering needle (13), the first touching
Ultraviolet preionization discharging gap is formed between hairpin (13) and the second triggering needle (19).
2. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 1, it is characterised in that：
The equalizing resistance line (6) is to be coated by resistance slurry or be printed in interior insulation cylinder (5) outside, and high temperature sintering forms
's.
3. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 2, it is characterised in that：
The interior insulation cylinder (5) up and down two end face metal claddings as upper surface electrode (17) and lower end surface electrode (18).
4. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 3, it is characterised in that：
The center line of the through-hole is directed toward the central axes of insulating cylinder, and the connection terminal (16) is by through-hole wall metal cladding institute
It is formed, which extends to the inside and outside wall of insulation.
5. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 4, it is characterised in that：
The inner wall of the interior insulation cylinder (5) is evenly arranged with multiple V-type annular grooves along axial direction, and the multiple through-hole correspondence is provided with
At multiple V-type annular grooves；
The side wall of each target (10) is provided with support member, and odd number target (10) relies on respective support member
Correspondence is installed at multiple V-type annular grooves, and is located at interior insulation cylinder (5) with connection terminal (16) by the way that a support member is corresponding
Interior one end electrical connection.
6. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 5, it is characterised in that：
The support member is ripple pearl screw (11).
7. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 6, it is characterised in that：
The wavy shape of resistance line segment, wave are small in the end and big in the middle.
8. a kind of Multiple level series direct current gas switch of low activation threshold value according to any one of claims 1 to 7, feature
It is：
The quantity of the odd number target (10) is 5.
9. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 8, it is characterised in that：
The quantity of capacitor (7) is 2 in the capacitance resistance network, and two capacitors (7) are arranged in series on the central axes of switch,
One of capacitor is arranged between upper high-field electrode (8) and immediate target (10), another capacitor is arranged upper
Below high-field electrode (8) between first target (10) and second target (10), close to upper high-field electrode (8)
Capacitor is greater than the capacitance of another capacitor.
10. a kind of Multiple level series direct current gas switch of low activation threshold value according to claim 9, it is characterised in that：
In addition to trigger electrode, remaining target (10) is provided centrally with electrode plate, in being provided centrally with of the electrode plate
Heart hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810613883.1A CN108832485B (en) | 2018-06-14 | 2018-06-14 | multi-gap series-connection direct-current gas switch with low trigger threshold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810613883.1A CN108832485B (en) | 2018-06-14 | 2018-06-14 | multi-gap series-connection direct-current gas switch with low trigger threshold |
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| Publication Number | Publication Date |
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| CN108832485B CN108832485B (en) | 2019-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115249950A (en) * | 2022-06-29 | 2022-10-28 | 西北核技术研究所 | Annular axisymmetric ultraviolet preionization triggering structure |
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| US20150288176A1 (en) * | 2012-11-16 | 2015-10-08 | Phoenix Contact Gmbh & Co.Kg | Ignition circuit |
| CN107395173A (en) * | 2017-07-25 | 2017-11-24 | 西北核技术研究所 | A kind of multi-gap gas switch of low activation threshold value |
| CN207150551U (en) * | 2017-07-25 | 2018-03-27 | 西北核技术研究所 | A kind of multi-gap gas switch of low activation threshold value |
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| CN101950926A (en) * | 2010-07-22 | 2011-01-19 | 西北核技术研究所 | High-voltage multi-gap series gas spark switch |
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| US20150288176A1 (en) * | 2012-11-16 | 2015-10-08 | Phoenix Contact Gmbh & Co.Kg | Ignition circuit |
| CN104022442A (en) * | 2014-05-26 | 2014-09-03 | 西安交通大学 | Quick-acting bypass switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115249950A (en) * | 2022-06-29 | 2022-10-28 | 西北核技术研究所 | Annular axisymmetric ultraviolet preionization triggering structure |
| CN115249950B (en) * | 2022-06-29 | 2023-07-21 | 西北核技术研究所 | Annular axisymmetric ultraviolet preionization trigger structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108832485B (en) | 2019-12-06 |
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